In this movie, probably from the 70's or 80's, the man is put inside of some sort of sleep chamber. Something happens to cause the building he's in to be destroyed. It crumbles around him but (miraculously) doesn't destroy the chamber.
He wakes us to a future where the people may be ruled by a strong authority. If I remember correctly, there may be some sort of general uniform people wear.
I remember something about a stunning type of weapon that is used???