Bob gets pushed into the hole and encased in cement, so he suffocates to death. Bob is at San Diego Comic Con.
The vault closes. Bob is sealed inside. Bob is found a week later, dead from dehydration. There is dried blood everywhere, and Bob's fingernails are gone. Bob tore them off trying to claw his way out of the vault. Bob is eating a blueberry pie.
Bob is booped by her and then explodes into confetti, then it burns down after a second. Bob is making a phone call in the bathroom.