How do you know when you've picked the wrong gas station to rob? Let's just say if an MMA national champion punches in there, you've made a grave mistake.

Houston gas station clerk (and former five-year reigning MMA national champion of Sri Lanka) Mayura Dissanayake noticed his co-worker being robbed after returning to work following a bank run. While his co-worker struggled with the would-be robbers, Mayura was able to come to his aid and lay waste to the two-man crew with relative ease.

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