Our most memorable was on our first ride of the revamped Spaceship Earth last December. We were at the top and our car had just turned around to make the descent when we heard a horrible grinding noise and the ride stopped. The worst part was that we were right next to a super loud speaker and a CM kept announcing that they were working on the problem. After 45 minutes (nearly deaf by that time), we ended up having to walk all the way down to the bottom, and the ride was closed for the evening. We weren't able to go back to ride it again, so we still haven't seen the new version