Ok, Mark was scared and I don't blame him, but he could've gotten.....
protection.
I like this movie a lot. It's one of my favorites, but seriously, during the whole movie I can't help but wonder why the heck he didn't take all the protection he could get. I don't blame him for being scared. I'd be freaked out too. But he pretty much asked to get threatened. He didn't need to fake that Post Tramatic stress syndrome, only to get chased by that mob guy. As boring as jail might sound, I'd stay there. I'd tell the authorities everything I know and then get me and my family someplace safe. I know that there'd be no movie if Mark didn't act the way he did, but in real life, if you are ever part of a crime and your life is in danger, you get protection and you get it good. You get the best protection possible, even if it means going to jail for a couple of nights. You surely don't walk the streets and escape from jail.