I use my knife like a fidget toy. Not usually in public, but one time a sales guy came in and it was just me and him. He's basically a friend.

I flipped the knife out and his eyes got huge, his arms went out sideways and he got in a football stance.

After he calmed down, he told me he was actually attacked with a knife when he was a kid.

Not long after, I finally wore out the fastener on that knife (a buck). Luckily I had already bought a twin for backup.