Was the guy at the bar a hit man who entered the bathroom only to later emerge blazing away like Michael Corleone. Or was he a body guard who had to take an unfortunate leak as the real hit men entered the bar ready to waste Tony and the family. Then again, what about the trucker with the beard and hat. Was he the hitman in disguise?

BTW, I would not have minded if the whole Soprano family, save Meadow, got wasted

I guess the movie will provide the answers.