A Philadelphia bus driver is being praised for chasing down a purse snatcher.

Charles Arterbury says he just did what he had to do.

The 28-year veteran of the Southeastern Pennsylvania Transportation Authority had just started his first trip of the day Monday when he saw a man knock down a woman at a bus stop and take off with her purse.

A surveillance camera showed him bolting from the bus in pursuit of the purse snatcher.

He caught and pinned the man to the ground less than a block away, and two passengers held him until police arrived.

Passengers applauded Arterbury after he returned to the bus, and the purse-snatching victim gave him a high-five.

Meanwhile, Arterbury said Friday his son is sending him "Captain America stuff."