And good police training means they didn't shoot an unarmed man when they had overwhelming force and had you surrounded. There are enough of them to just sit on you.
While you push the button...
Wrong. They didn't know he was unarmed. They did know that if he was wired with a bomb, he could set it off unless they killed him--not just wounding him (he would still set it off), but killing him. Experts who've worked around terrorists a lot in places like Israel know that the only way to stop a suicide bomber is to shoot him in the head, and do it more than once.
I didn't run or jump a turnstile either.
It is a tragic but understandable mistake.
Oh yeah, that would be real smart with a guy acting just like the Palestinian suicide bombers, and dressed in a heavy coat, just like the Palestinian suicide bombers, and coming out of a house that is under surveillance. Just sit in the guy while he dentonates and blows up you, your buddies, and possibly dozens of innocent civilians who are in the tube station.
And if the suspect that the police are sitting on is believed to have a bomb on him or in his backpack, and the suspect won't keep his hands away from his body, what should the police do then?