Chris Hegnes, manager of the Englund Marine and Industrial Supply, was going into work early Monday morning when he encountered a man in a mask charging at him with a hammer.
Hegnes says he hurled his hot mocha at the man's face and ran for it.
The man came after him for a few steps, then ran to a vehicle parked behind the store.
Hegnes says the man apparently had been trying to break into a safe using the store's hardware tools. The man didn't get away with much, but damaged some tools.
The sheriff's office is investigating.