Tony is a monster, instead of saying "f**k Lopez' money its in the car, leave my friend alone", he shut his trap and painfully watched Angel get sawed off. He obviously thought the money and the two keys of cocaine were far more important, and we all know he did that to show off to Frank, which explains why he gave everything back instead of keeping the money by saying it got lost, or a key by saying he had to flee the scene fast. Sacrificing Angel was a way to win points with the big man, who he wanted to surpass ever since he first openly tryed to seduce Elvira.

Tony was a self-centered monster. Nonetheless it is hard to not like him since he is the anti-hero of the movie.