If you want guests to know you'll kill them if they don't like the food you've prepared, try this little guy. Designed by Raffaele Iannello, and available from ThinkGeek, "The Ex" is available in red or black ($70) and chrome ($100). It even comes with five knives, so you're ready to do some stabbing right out of the box. I would get one, but the doctor says I'm not allowed near sharp objects. The last time I had a Swiss Army knife I cut two fingers off. They weren't mine though, they were the doctor's. I'm from the old school, where you hold the thermometer in your mouth. You know where he wanted to put it?
Knife Rest Lets Guests Know You'll Kill Them [thinkgeek]