yes i think you're right but i also think that in "witness to the mob" they made Gravano look a little bit innocent in the story..like he had to do it...it was he's only exit!
True, though the impression the film leaves at the end is that gravano is a remorceless killer. In Gotti they tried to make it out like gotti was disgusted with gravanos violent ways and that he was some sort of robin hood character, when in reality gravano played an integral part in his rise and also his survival through that time with the threat of getting killed and the car bombing.
