He's ok.
Spoiler Alert:
The first one is a solid piece of glass that just slides up so he can crawl under it. Everyone outside is either faking or didn't pay attention.
Second is just a deck of 52 identical cards, mixed with simple levitation tricks.
Third is a platform. The two kayakers are a nice touch to show "it can't be" so the platform must be segmented, first half lowered a foot or so down after he reached the second.
I could be wrong but this is how I would do it.







