I'm surprised that you didn't mention/know that there were two different endings. One where Jake (Mario Van Peebles) dies by getting eaten and taken down underwater by the shark and another ending where he comes up alive after the shark blows up. Which had to be at least 10 minutes of being underwater, inside the shark and half eaten. But somehow miraculously survives all of that and the shark exploding and swims back up to the surface in pretty good condition, and I believe cracks a joke.