Many years ago I worked at a company that had to print out every transaction with a dot-matrix printer every evening. It was my group's job to do very minimal maintenance on it like adding toner/paper and such. When filling the toner though, you had to screw the toner container onto a special.... gyrating.... setup just to make sure all toner came out. A thing that struck me about it was how uncannily, uh, sexual, it was in its gyrations.

Does anybody have any idea what model of printer this might have been? I'd love to see a video of it again.