Jaws 1 had the sheriff shoot the scuba tank that was in the harks mouth and the shark blew up.
Jaws 4 (the one in the carribbean) is the one where the sheriff's son (all grown up now) knocks off his tank valve and rockets to the surface to get away from the shark, not to mention in the very next scene he is flying in a plane. And nobody called DAN! He was killed when they had that electronic tracker thing that set off al pulse (I guess) that mad the shark mad and he ended up jumping out of the water and got stabbed on the broken thing on the bow of the boat. The broken thing on the bow was broken earlier in the movie when Mario Van Peebles was hanging on it, trying to shoot the tracking thing in the shark and Jaws ate him.
Jaws 3 was the one that was in 3-D and took place at Sea World and I think Louis Gossett Jr was in it. The spare air may have been involved in that one. Jaws was killed when the last guy he ate had a grenade in his hand, but Jaws didn't completely swallow him, and so one of the other guys pulled the pin and Jaws blew up.
Jaws 2 was when the kids went sailing to cable junction, got stranded, Jaws came, ate one or two of them, and Jaws died when he bit the electric cable and got fried.
Ok, I feel really sad now that I actually know all of this.
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