We've only had it happen once...a 2-hour line (that was three in real life) for Mine Train. The boys wanted to ride, and hubby agreed to wait with them while I went to the Emporium and to relax in Frontierland for a while. I headed back to Mine Train just about 2 hours after I'd left, and they were still in line and hubby had to go something awful, so I joined the boys while he went to the loo (love that word!), and he re-took his position in line with the boys upon returning while I left the queue to wait for them all.