Used to flip butterflys a lot when i was a lot younger, it was kind of "cool" back then with my lads, but i really got upset when one of my buddies got in a situation when this "toy" turned into a weapon and ruined his life, it was kind of a self defense thing, but without of that "toy" two young guys still would be alive, one stabbed and my buddy commited suicide 1 1/2 years later because he could not get over this thing....
Still my edc knife is an CRKT M16.
Be careful, carrying weapons means responsibilty!