Does anybody know the name of a film where a man (I think that its joe pesci) is signing a contract on mans back, then he stabs him in the back with the pen dotting an I or false stop?

does anybody know the name of a film where a man (i think that its joe pesci) is signing a contract on mans back, then he stabs him in the back with the pen dotting an i or false stop?
The only movie I remember someone being stabed in the back while letting someone sign a contract on his back was "The Running Man" Arnold Swartzinager, Richard Dawson,
When they finally catch arnold and he has to sign contract be for going in to the games.

In the film Casino, gentle Joe repeatedly stabs a guy in the neck, because he disrespected Robert Deniro.