Mmmmm.... nothing quite like the smell of rotting threads in the morning.
Anyways, here's mine:
When installing the battery for this year's 'bot, I was trying to figure out how much of the Anderson connectors we should cut off. In order to make sure everything would fit in the robot properly, I connected the two ends together. Now, this wouldn't be that big of deal, except I stupidly used the connector I had already stripped the insulation off. Needless to say, while bending and twisting the wires to get them into the proper position, I ended up touching both ends of the stripped connector the robot chassis.
What happened next is left as an excercise for the reader.