Nothing would have happened to this guy anyway he is God: "he sees everything"!
He is obviously someone who is trying to enjoy every minute of his life. Sounds like a real character and probably fun to be around on the ground, not sure I would get in a helicopter for a lesson with him though!
You can clearly see the MAP gauge and it is sitting around 23" when he is trying to pick the plane out of the tree. Considering the weight of the pilots, the temperature (doors off) and the lack of wind there isn't much power to get out of any snagging or re-circulation caused by the trees. Then he pegs it on 25" (which I'm sure is more than the max for the day) just to sneak over the top of the trees... phew! And then giving it back on the ground with all those people walking under the disc!!!
You wouldn't see me trying this or recommending anyone else do it but hey he did it and got away with it and everyone was happy this time. One thing for sure it is certainly an interesting video and a great tool for learning through debate.
PT