You can thank an armed, off-duty firefighter in Springfield, Missouri for thwarting potential harm at a local Walmart.
Twenty year old Dmitriy Andreychenko was armed and grabbed a shopping cart and started filming himself as he pushed the cart around the store.
The store manager pulled the fire alarm and the shoppers fled.
Cops say Andreychenko tried to exit the store when he was met by the off-duty fireman who held Andreychenko until police got to the scene.
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(Photo by Tim Boyle/Getty Images)