This is tied for my favorite attraction in all of WDW (and rightfully won John's Best Attraction contest over at The Purple Folder.) The excellent, detail-oriented storytelling combined with a thrilling flume ride is definitely a Disney trademark. I even took some screenshots from this HD video to illustrate why it's one of my favorites:
View as you begin the ride.
View just before the drop. Gorgeous!
Hidden Mickey in the finale showboat scene - he's in the
lower-right hand corner, just above the YouTube logo.