This was about 4 years ago. We had just exited the light tunnel on Space Mountain, went down the little drop, around the sharp hairpin turn and then came to a stop. The lights went on and there we sat. For a good 15 minutes if not more. Of course I didn't have my good camera with, so I just snapped some with my junky slider phone that I had. Since it is normally a quick ride, you don't notice how cramped it is in there. But about 10 minutes in, I started feeling it in my hips from being scrunched in there. Finally after getting the people on the lower trains out, they came up and got us. I got to walk down inside a little ways then we got into and elevator for the rest of the ride. I would have liked to walk the whole way.
This was all caused by someone who wore a hat on the ride that flew off and tripped a sensor.
We ended up with a FP to use on any ride. We went back and used it on Space later that night. It definitely wasn't the same ride after seeing the inside all lit up.