Worst stoppage was getting stopped on The Seas with Nemo and Friends, the first (and last) time I rode it. We got stopped in that EAC hallway with projected bubbles, which was incredibly disorienting, because you couldn't tell if the clams were moving or not. There was no "remain seated" audio and I'd never been on the ride before so we thought it was just a really, really long hallway for a while. Got stuck for about 15 minutes. The most motion sickness I've ever gotten on any ride, anywhere. We ended up giving away our Test Track fastpasses to a nice family from Alabama because we were too sick to go on it.