He happened to be somewhat nearby when the explosion called his name louder than any voice could. He dumps the fairy floss he was chewing on in the trash and meanders into the bank, taking a moment to scope out the scene before seeing the teller being molested by quite a violent toothed creature. At least he had a little flair.

He makes his way over and cautiously steps between them, not wanting anyone to get an accidental grenade in the face.

"Why not take me? I'm a much better hostage. John Smith. Bank manager. Nice to meet you."