I'm reminded of something that happened my freshmen year. We had a small test robot sitting around, and a new member not skilled in electronics walked by. The drive motor for it's arm was off, so the output leads from a victor were hanging loose. Not knowing what was going on, the new member plugged those into the fuse board, making it so power was coming into the victor from both ends. When we plugged the bot in to test the drive train, we saw some pretty fireworks. This has been the only time that I have seen a victor spit molten slag into the air, as well as fill an entire room with smoke. All in all, the lesson learned was to check all wiring before running a bot.