Stupidest Programming Mistakes

[jfelser]

I dunno if this is truly a programming mistake... but testing autonomous (using PID) we forgot to plug in one of the the interrupt pins on the encoders, resulting in a very interesting open-loop control system, and various material damages (the robot LED, the green light, the 6' stack of books the light was sitting on, the desk the books were sitting on, the counter with microscopes behind the desk with the books and light, and my self confidence).