Jack was really shaken up by what he did in the Reptile House. He thought about himself and realized he'd been very nasty and he decided he wouldn't be bad anymore. He felt very guilty about all the terrible things he'd done, and he didn't know how to say 'I'm sorry', so he decided to commit suicide. He thought he'd just jump in the wolf enclosure and let the wolves eat him to death.
Jack didn't know that wolves are sort of nice and they don't attack people. The wolves came up to Jack and played with him. Jack felt better and decided to try to fix all the bad things and make them better. He couldn't fix the guy that the bears ate though.