[ExarKun666]

-Have, a team member screw in the sprockets and then doing it so they are lose, then switching the same sprocket, and trying to get it in the sprocket hole again, but then stripping it, and then not being able to find a replacement in time.
-Tell a incompetent fool to press a trigger that controls the piston that goes up and down for your claws on the bot, and the fool goes trigger happy, leading to the snapping of the robot in two pieces.
-Rebuilding the gear box 18+ times, and then it still doesn't work
-having one wheel with a lot of drag then driving, and try to go full speed and the bot spins in a very quick circle with parts flying everywhere