Got stuck on the Maelstrom for 45 minutes once. As we boarded, I remember being annoyed that they crammed another two adults into the row with us - very uncomfortable for 4 adults across.
Then, our boat would not get through the gate that reverses you at the outside overlook. Why? Because we were overloaded. We sat there for over 30 minutes while various people with no knowledge came by and looked us. Then for 15 minutes some other guys poked and prodded our boat. I think they did not want to get us out for fear the gate would suddenly activate and release the boat. Finally, at least 45 minutes into this, some guy sat down and literally pushed the boat with both his feet and got it to move.