On a training day with an emergency response unit one of the guys ask if he could borrow my SAK to slice open a bun. I thought that he could do it without inflicting major damage. So I gave the knife and a word of warning to him (that knife was quite a bit sharper than the factory condition). After him being half way through a remark about NOT being to stupid to handle that knife and cutting all the way through the bun and deep into his hand I had to admit that I was wrong. As the medic in the team I had to administer first aid. The guy with the cut earned some laughter from the rest of the team, a tetanus shot and just barely evaded stitching. Folks there remembered (and did not fail to remind him) for a long time that he lacked the skill to slice bun without shedding blood.
On the bright side the SAK suffered no damage at all and the blood was easily wiped from the blade.