I believe it was the 2004 Great Lakes Regional when the TechnoKats made a minor modification to our robot that had huge consequences. That year was FIRST Frenzy. We made a rather ill attempt at a hook to lift our robot off the ground. It almost worked if I remember. However, we were trying to cut weight off for the elimination rounds, so we decided to take the hook off. Not realizing it was a rather load-bearing hook for our massive "claw" that year, the wrist of our gripper decided to break off in the middle of the match.
This was us trying to fix the arm:
