Yup, when we went to ride HM during MVMCP on 12/11 we had to wait for maybe about 10 minutes at the load area before we could ride due to the doombuggies stopping not once, but twice. We felt like we were close to having to turn around and leave once, but they finally got them started up again after a lot of running around with flashlights.
That same night we got stuck on TTA while inside SM and that time we did end up having to be evacuated and walk the path from inside SM to a stairway that led down to the sidewalk beside SM.
What a wacky night!
i was there that night for the MVMCP and saw TTa getting evaced. HM was also one of our first stops (right around 8 pm or so) we were outside for a few minutes, a bit longer than i'd normally guess and the spiel didn't start until everyone was practically in the foyer. we also stopped right around the HHG scene, but i think it was due to letting on handicaped peoples.