It was just a typical Monday morning last week at Holly's Gas Station. Justin Ireland was at work with his dog, Thor, when a suspicious man walked in.
"Guy walked up to the door, asked if he could use my phone," Ireland told WGME. "I never let anyone in the building. So I said no, I don't have a phone you can use."
When the man pulled out a gun and demanded money, it became clear he wasn't interested in the phone.
"As soon as he pushed me, that's when Thor jumped up at him," Ireland said in his interview with WGME. "I started yelling, that's when he went right after him."
In a lighting-fast reaction that proves Thor was named appropriately, the Pit-Bull-Boxer mix lunged at the intruder, initially biting him on his hand, then going for his face.
The would-be robber's reaction was what you might expect.
"As soon as the dog went after him, they guy took off quicker than anything," Ireland told the station.
He added that Thor has never done anything like that before, though he always wondered what he'd do in this type of situation.
"The boss likes him just because he looks like good security," Ireland said to WGME. " And now I know he actually is."
Police are still looking for the suspect, but video of the entire incident is sure to help in the search.