Here's the scene: you're at the job site, there's an active shooter and your only possible hiding place is inside the toilet of a porta-potty. You climb in and the shooter thinks he's punched holes in everyone, now he's gotta go. He walks into your porta-potty, sits down right above your head... you're not getting shot or shat on today. No way. You shove your fist inside his ass. Bam, reverse hole puncher.