Alright so does anyone know how to do a 2h riposte?

Last night I experienced the most painful thing ever. Put Iron Flesh up after someone invaded in anor londo when I wasn't ready. Backstabs me, not much damage. Parries my 2nd attack and holy shit....the animation goes into him on top of me, then he bashes me with the hilt of his lightning zwei for more than half my hp which is 1590.

And of course it killed me. My friend said to 2h your wep after a parry and that it requires specific timing. Not working for me so far.

Aside from the Homing Soulmass stuff, I've never seen anything hit so hard :z

It's only possible with either the use of a Target shield or a Parrying Dagger, since they increase the window of time after a parry has been achieved allowing you to switch to 2H and do the riposte attack.

I've tried it out myself and it's a killer, though since there's usually a certain amount of lag online, parrying really becomes a matter of chance. Plus, there are certain attacks that cannot be parried. Heavy weapons (Greataxes, Zweihanders, Great Clubs, etc.) when 2H and using the strong R2 attack are impossible to parry and the R1 attack has the smallest window of opportunity outside fast attack weapons.

And it doesn't matter if it was a lightning Zweihander doing the riposte. Actually, if the guy was carrying a Zweihander +15, he would have done much more than just half your health in the riposte, since lightning damage isn't calculated for the critical damage, just the physical damage. 

I herd if you kill the massive queen chick in Anor Lando the sun disappears and it stays dark forever, is this true?

At least until you start New Game+. The sun disappearing isn't the only consequence though; all enemies disappear as well and are replaced by two hostile NPCs before the start of Smough and Ornstein battle and you'll be a target for invasion from the Darkmoon covenant if any player of that covenant has the ring equipped. This invasion is different from other invasions, since you don't get the message that you're being invaded, thus you never know if any other player is hunting you as long as you're in Anor Londo.

So is this how he did that "special" parry? I've been 2h riposting on a random enemy but it doesn't do the animation that the guy did. I'm really trying to figure out how did it cause it did an insane amount of damage.

I'd have a hard time believing that a +15 zwei would've done more damage. I'm assuming that maybe Iron Flesh has alot less lightning defense, seems like that sometimes. Adding "much more" damage to that riposte would be just plain redonkulous - when I say more than half my hp, I mean a really huge chunk :z   Maybe it's cause I had the golem set on, which has pretty much no lightning def.

Again, Lightning damage isn't counted for criticals, nor is any kind of elemental damage. If you have a hard time believing it, try it out for yourself. Craft two Zweihanders differently, one to Lightning +4 and another to +14 and see what is the one doing a lot more damage. 

Iron Flesh has no elemental resistances, so you'll be receiving the normal elemental damage as you would receive without using it. That's why for PVP Iron Flesh is totally worthless, even without factoring the extreme slowdown you suffer. Strong Magic Shield is a plethora of times better as that critical attack wouldn't have caused any damage.

If this is true, then that means it's likely that the single riposte he did would probably empty out my entire hp bar (1590). I'm less curious about what mod he had on his wep but way more interested in how the hell he bashed my face in with the pommel of his sword while I was on the ground. Actually now that I think about it, considering that elemental damage isn't factored in crits, it makes me wonder even more how he was able to put that absurd amount of damage into his pommel-bash thing when he backstab'd me before that for barely any damage.

Google searches bring up nothing. My friend who somehow knows about tons of major exploits/etc couldn't find anything on it either.

Wait, didn't you say originally that he had parried you and riposted with a 2H? I haven't seen the animation of a riposte from a 2H parry, so I don't know if that's the ground pommel effect.

But what is it, you being hit on the ground after a backstab, or a 2H riposte after a parry? Because there's a lot of different factors for varying damage from both, such as ring equipment.

Guess I should've been more specific. My friend kinda jumped to conclusions and said it was a "2h riposte" so I also jumped to conclusions and assumed it was :z 

From what I've tried, there isn't a different animation from doing a riposte while 2handing your wep.

I'm wondering how he did that type of riposte. It looked like a normal one at first, then all the sudden I'm on the ground and he's on top. That's when his char hit me in the face with the pommel of his sword (could've sworn it was a zwei) and took off a massive chunk of my hp. He pulled it off after parrying my black knight axe with a shield.

Could it be the bug/glitch described here? http://www.gamefaqs.com/boards/606312-dark-souls/60242926. I have yet to experience it myself, but it does sound rather odd. 

I've never seen such animation, only time I've ever pommeled someone in the ground was after grounding them with a 2H Great Club and doing the leaping attack which turned into a pommel.