If you have a Disney Visa you can get 20% off the tour (last I heard). There is no annual fee on the card so you could get it just to pay for these tours if you do not already have one.
Seriously- that is soo annoying. My BF had to restrain me from using the emergency exit last time. Held hostage by a ride in Epcot- that is not very Disneyesque.:veryconfu