matress jumping hmm i would have checked it out. such a chance comes only once. a window open up violently or not is not special at all. if its a slide window maybe the lock is defective. maybe a cat opened it twice because first time your friend closed it before she could jump out. or dozends of other reasons depending on climate weather and condition of the window.

drugs where also my guess cocaine and meth can do things like that in higher dose and or sleep deprivation. but since you said no drugs most likely your friend was shitting with you. or maybe there are other unlikely (but not impossible) explanations like a sudden and extreme drop or rise in the oxygen level of the air or a gas leak nearby. The whole situation is so cliche its not even funny.

its not that i dont believe you. I just know its impossible that this had a un natural cause. there are a lot of things humans dont understand but some things we do understand things like classic ghosts are physically so out of the realm of possibilities that we just know they cant exist. in a perfect vacuum maybe but on earth. ?

souls on the other hand could theoretically exist. but ghosts are concious energy that even can manipulate tangible objects. give me real proof i pay you 10 grand. i would like to see something supposedly supernatural for myself. if there were ghosts out there people would hunt them down and pinpoint their location. next thing is: why are people scared of ghosts can they kill you ? how ? why dont they go on a killing spree then ? if i see a mysteriously moving matress i check it out and try to figure out whats going on. why do people run away when something mysterious happens ?

its your chance to become rich and famous. i strongly advise you go there as soon as possible with a hd videocam and nightvision take a bunch of friends with you and make a movie.

i actually believe you that you saw what you saw but your conclusion of ghosts is rediculous maybe it was fairies or demons or something else entirely. all you know is that you saw something you cant explain thats it. no surprise here. moving matrasse you saw after the window your brain was already flooded with neuro transmitter like dopamine and adrenaline it was dark your brain had not enough informations so it filled in the rest. a moving matress is easy to see if you think there are ghosts. if you knew how much of the things we see arent even visible technically but the brain fills in automatically the missing informations you would see how easy that can happen. the windows are no mystery at all and your friend wanting to come again because its exiting ? doesnt he see those things regulary ? if he knows at what time it starts why doesnt he have more detailled information he should have had enough time to figure out more. and why is he staying just until 1:30 and not longer. why hasnt he a long time ago documented all this weird stuff like flying files etc.

I think the story was more like this:your friend tries to make his work sound more interesting and tells you that he always goes at 1:30 to make it sound more mysterious he says see for yourself. then actually the window opened (defective lock, wind some guy) your friend is surprised too (or not) but takes the opportunity and says today they are starting early. then goes and closes the window maybe not properly and it opens again you frightened see the matress moving he infected by your fear and his amazement because of this unbelievable coincidence starts to believe his own story and wants to go again.

or maybe he planned everything and is just amazed what an impact it had on you so he wants to go again with you to make even bolder things to see if you believe that too. or maybe he was honestly surprised like in scenario one but this time he wants to go all out and really trick you.

to really evaluate whats the most probable cause you should describe the situation better. you were sitting inside the
the caravan and the light was on ? or you were sitting outside ? how far was the matress away from you ? could it be a massage bed ? whats directly under the bed ? did the matress jump multiple times ? how high ? or was just part of the matress moving ? could the window be moved from the outside ? would you see a person outside ? or was the reflection to high ? was there a cooking plate in the caravan ? gas or electric ? does your friend have any sexual interest in you that you are aware of ? was it hot windy humid ? how far is the graveyard away from other people ? are you living in a city or village ? how high is the altitude ? have you eaten something maybe your friend found some mushrooms on the graveyard and made some sandwiches with them ? did you have alcohol ? absinth by any chance ? the caravan wasnt near a high voltage powerline ? how old is the caravan ? what chemicals were used in or on it? have you slept properly ? do you have trouble sleeping ? do you take medication ? i could go on there are plenty things that could explain what you experienced.

I wish sometimes this reality would have more magic. i prefer dragons demons ghosts vampires and faires over war
anytime. or some superhero or angels aliens on earth robots time travel super geniouses that can invent everything or santa and whatnot. but our world is boring and follows rules that cant be broken or bend so that it would matter on earth. maybe we will invent the matrix and everything will be possible sadly i and everyone living now will be long dead when that happens.

as for the window it opend very strongly like someone push it and if its happend 2 times then something push it but we didnt close it after the second time, for the jumping mattress it jump 3 times infront of their eyes if its hallucination then each one of us will see diffrent thing but no we saw the same thing together also i didnt say its ghost because actually i dont believe in ghosts and i said its something i dont know something strange .. alot of people told stories about ghosts/ spirits or demons whatever it is  moving objects in some areas but a few very few saw it in real ( i think am one of this few now ! ) also some of them as i said told me if you want to see the real thing go to oman if you know it.

but if you can come here and experince it yourself then this is the adress:

in UAE ( united arab emirates ) Abu Dhabi city kornish s.t,  kornish hospital then there is a  big old graveyard there beside the hospital surrounded with wall and trees inside it.

check it yourself if you want and see if am lying.

if i go to the uae i will check it out might take a while though.

LOL, good observation!

have you ever went to uae ? you know how they plant the trees there ? you know that no tree can survive the heat without water except the palm trees ?  google it and check it .. also go to google maps and see how many geen areas is there. you will find nothing but a sea of sands!

Damn bro where's the master sword when you need it?

Well, in that case, the heat during the day must've affected the poor fellow's mind.

lol as you want.

It's hard to believe these kinda things on the internet you know

I've been to UAE (Dubai) twice, the next time I visit I'll make sure I visit this place in Abu Dhabi...at 1am.

thats why i dont blame anyone who dont believe, even i dont believe it first :P