Bargnani has hit a handful of big shots. The three I remember off the top of my head are the four point play against Seattle (RIP), the buzzer beater against Portland in his rookie year, and the big three against Charlotte last year. There have definitely been others. In fact I've always thought of him as a clutch player, and his misses against New
jersey haven't changed that.
But it's different hitting a big shot off a pass when you're the second or third option on a team versus being given the ball with 10 seconds left in the game and being told to win it.