I've been evacuated from two attractions:
-First one was Dinosaur, back in 2004. It stopped in front of the scary one on your left (um, how embarrassing I don't know which dinosaur it was!). We thought it might start up again until the lights came on. No announcements were made about pictures so I took one. It's a magic killer, to be sure (don't worry, I won't post it, , but PM me if you want to see it). We waited about 20 minutes for someone to come and assist us out of the Time Rover and through the rest of the attraction. We received FPs for any WDW attraction for our "troubles."
-Second time was in Aug. 2006, on PoTC. We stopped right after the drunk with the cats, and we kept floating back a few feet, then forward a few feet. The lights never came on, but the music volume went down from a '10' to a '2,' and the AAs kept moving. It kept on for about a half hour to 45 minutes (it was long). People started climbing out of the boats and going through the 'exit' signs located throughout the attraction (which really ticked me off - how disrespectful and dangerous!). CMs came over the speaker to politely ask us to hold on, for our own safety (ignorant guests were screaming to the 'heavens' and kept getting out...just terrible). A female CM came out to apologize and ask us to hang in there face-to-face. The people in the front of our boat were SCREAMING at her, ripping her a new one (sorry, but that's the description). The lady in front of me (who my sister and I had been talking to) told them to lighten up and wait, it was for our own safety, and don't be mean to the girl as it wasn't her fault. The rude people's kid was crying, and the parents turned their anger toward the woman in front of me, "You don't have a screaming child (side note**we had to hear your screaming kid too) starting calling her an "expletive American" and making threats (her husband sat silent). Holy Awkwardness, Batman!
I called my brother, a former Fantasyland CM, and told him what was going on...he said, "If men come out in wet suits, you know you're in trouble." Next thing you know, here come the wet suits! Our boat was pulled back and we exited to the left of the boat (across from the drunk and cats). We went up stairs, and emerged backstage (we saw the parade floats). There were about 25 CMs guiding us down a path back into the park (I assume it took awhile for them to find the number of CMs necessary to ensure all the guests wouldn't be left alone to wander backstage...although I wonder about the hoodlums who got out on their own. I find it hard to believe they could find their way back on their own (a CM told me they were probably escorted from the park).
We again received FPs for any attraction (not just FP attractions) so we used it for Speedway, which we never do (figured we can get a FP for anything, so why not do an attraction we don't normally do?).
Oh, and the father of the mean people up front was following the woman who sat in front of me all the way back into the park, getting in her face, and literally threatening her. I don't know if the CMs guiding us (they stood in a line all the way back into the park) thought he was with her or what, but I finally stopped and explained that the man was threatening that woman and I was afraid he might become violent. I didn't want to get anymore involved, so my sister and I walked slowly to avoid them.
Whew, that one was quite dramatic!