What is the strangest issue with a robot you have ever seen?

[cbale2000]

Back in 2009 when the new cRio control system had just come out, we were experimenting with it on one of our older robots to test out the new control system. This was back before Watchdog was a thing (or at least a thing that worked), so momentary signal losses would cause strange behaviors with robots. Consequently, our first attempt to drive the robot with the new system resulted in said bot driving full speed across our practice field and slamming into the cinder-block wall of the building.

Ironically, the robot was fine, the wall got a nice hole in it though (which is still there to this day).