I can care less about the movie. It was OK nothing special but I will answer a few of your questions.
The man didnt have any other way to get out. He didnt run into it. He just got so cut up he died on his way out.
Villian isnt some super hero. He's just the bad guy. If he didnt continually live through out the movie, there wouldnt be a movie, right?
They didnt notice that he was alive because he druged himself and he was "out" during it all. Everything else was set up prior to that. Such as the guy he forced to do everything for him while he was "out."