One time, my kernel was crapping out and endlessly printing stuff I couldn't read because it was scrolling WAY to fast and ctrl+s did not work either, so I photographed my screen to be able to read what the kernel was trying to tell me (hardware defect).
Once, we had an issue with a single board computer that seemed like a hardware issue so we called support, and they wanted the output of a logical analyzer. Unfortunately, we didn't have an interface for our old analyzer, and so we set up a webcam to show the analyzer screen to the support guy over NetMeeting. It was kind of funny, but worked great.
