A couple of thugs dressed as ninjas chose the wrong convenience store to rob in Pittsburgh.

In a compelling surveillance video, the two teens tried to hold up the Perry Market Friday night using machetes.

But they quickly fled when they were confronted by the clerk and an unarmed customer. The clerk pulled out a huge sword from behind the counter, pointing it at the teen's chest.

The store owner, Jewad Hayih, later grabbed a gun from the back of the store as the teens ran off.

The suspects failed to get away with any money or merchandise.

Watch the clip above.