Silly Programming screw ups (funny)

[3DWolf]

Post any silly programming errors, screw ups, etc here that you've made either in season or at nationals

My biggest one so far:
Nationals:
I was coding some side code for our demo board to simulate our braking system, but the guys putting it together used a type of valve I hadn't coded before, and when I was messing with it I turned a simple toggle into something strange. I was calling the toggle (with a trigger on a joystick) on the main processor loop (the 26.2 ms one) without any checks.
I turned our single fire brake toggle - INTO A JACKHAMMER. This little 2 inch stroke cylinder was firing in and out at an insane speed.

Then I had accidentally set our autonomous values backwards the first time so we drove backwards during a practice match.