Speaking of that scene Don Lights, the first time I saw the movie,when he grabs the gun and goes to touch it with his left hand,I was thinking Dont touch it!!! and then he realed his hand away.
In GF1-Too many to chose
In GF2-When he's talking to Fredo in the boathouse
In GF3- When he's messing around with the bread knife,"Maybe they should fear YOU!", "Vincent will you SHUT UP?!"