In the mid 1980's I worked for a long-distance telephone reseller that was branching out into publishing an executives' catalog, similar to The Sharper Image. We wanted distinctive products, and I invited salesman from Al Mar Knives to do a presentation.
During the spiel, I noticed a rather odd circular scar around the salesman's right thumb. As the conversation became more informal, he talked about the mark.
Returning to his car, he retrieved a beautiful dagger/hunting style knife, custom made for him by the factory.
He used the knife to drop out of trees and ambush ferral hogs.
He stated that one time he slipped. Instead of grabbing the hog firmly around the neck, his hand slipped into the animal's mouth, the tusk ripping open his thumb.
It takes all kinds, I guess.