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

[simpsonboy77]

I can think of 2 pretty weird issues. The first one was my fault, we used an encoder with too many ticks per rev connected to a CIM. We had this feed into a jaguar for I think speed control, but I don't remember. When the CIM would spin up to full speed, the jaguar controller could not keep up with the interrupts and would lock up. Even disabling would not cause the motor to stop.

Another issue was at 2013 Bridgewater. I was in the pits as a CSA and the FTA radioed me that a team was hanging after a match, but half their drive train was still moving. Couldn't replicate in the pits but we did fine some swarf near the Victor's PWM pins, and that Victor did power the problem drive motor.