Dremulous
Ages ago, when I still lived in New York City, I purchased a Dremel during a process that culminated in the creation of this:

What I had hoped to do was use the Dremel to slice strips off of a roll of aluminum siding and then fix them to a piece of wood to create a desk. So some siding was rolled out, and I started cutting, but the metal didn’t want to stay flat, and it managed to flex in a way that pinched the Dremel’s blade, and the thing totally shattered. After this I went back to the hardware store, where I bought the metal cutters you can see behind the bottle of German mineral water in that picture.
After this failure to use the Dremel, there was another one, during the course of which I left the tool at a friend’s, and then I skipped town. After a substantial stretch of time, it has been returned to me. Now, I didn’t really miss it whilst it was away, but having it again makes me feel like I should find something cool to do with it. We’ll see.