Watch: How to Open a Butterfly Knife Like a Deadly Boss

Just in case.

Every man should know how to defend himself, and that means knowing your way around a knife. In the latest episode of Scam School’s Modern Rogue, Brian Brushwood and Jason Murphy show us how to flick open a butterfly knife (no, not a switchblade, James Dean fans) like a deadly boss. 

Sure, it’s a bit dangerous (Boing Boing points out that Amazon sells “trainer” knives for you to practice on so you don’t slice yourself open), but nothing says “fuck off” like a whirling blade.

h/t Boing Boing