His new first and last name happen to match up with the name of an escaped prisoner and master of disguise who was on death row prior to getting away. Bob has just spotted the final item he needed in order to complete a very large and rare collection.
He is a marine biologist researching claims that leviathans are actually real on one lives in this very body of water. As to whether the claims held any merit... he never reported back. Bob is passing out applications for the role of minion at a super villain's convention.
Bob is hit by an errant blast from the Hall O' Death Rays. Bob is wearing full body armor and is heavily armed,
Bob has it on too loud, gets a perforated ear drum, it gets infected, he dies. Bob is building a snowman.
The person whom Bob is resuscitating vomits into Bob's mouth. (Look it up, it happens.) Bob chokes to death on the vomit. Bob is taking dance classes.
(Er, I'll take your word for it.) Bob's instructor is Vincent Vega. He accidentally shoots Bob in the face. Bob is on a bouncy castle.