Quicksilver, an alien robot modeled after the T2000, is highly vulnerable to electricity. He also suffers from memory loss when he's shocked. The worse the shock, the worse the memory loss. He's also got a 25 INT, unlike his player.
After the team's first major fight, in which Quicksilver is nailed a few times by the bad guys' lightning-firing Storm clone, the team leader decides that they ought to stick around to talk to the press. She figures it will allow them to do some damage control with regard to their public image, since they just got trounced.
Quicksilver obliges her by boldly striding up to the most popular TV reporter in the city and telling her that he has no idea what just happened because he reboots every time he's hit by electricity. He then goes on to detail every last power and disadvantage he has, heavily emphasizing his deep-seated fear of electricity.
Later, after the team got wind that every thug in town was buying stun-guns like they were going out of style, and after every villainous organization in the state started equipping their agents with electricity guns and hiring supervillains with names like Shocker and Thunderbolt, the player complained bitterly to me that his vulnerability was coming up far too often in play. Apparently, I was being unfair.