I was waiting in a line one time that was very long.... when I got to the front of the que.... it was the restroom.... :lol: I am going to make a guess.....how about Splash Mountain?
Indiana Jones and the Temple of the Forbidden Eye holds the record with a wait of 8 1/2 hours on it's third day of operation. It's been given the nickname "Indiana Jones and the Temple of the Neverending Line" (most commonly used on Jungle Cruise).
And to think that guests would riot when the wait for Test Track was over 2 hours..............