While I am sure someone on this thread posted something similar, I'll share one that made me laugh from our last trip to WDW this past May. On
Small World, a youngster of about 9 or 10 was acting like a shutter bug with his digital camera, trying to get as many shots as possible. On several occasions during the ride he stood up to get a better angle. At one point his father told he to sit down because, being on the outside, he might fall in. The boy then gave classic line #1: "Don't worry Dad because the water is just make believe like everything else in Disney." To which the father, who was on the opposite side, responded to by dipping his hand into the water and flicking some at his son. Upon getting sprayed, the boy then responded with classic line #2 (the one that had the entire "crew" cracking up): "Wow! That actually felt like real water! How much did Disney spend to make fake water wet!"
Luckily for me, I just happened to be taping the ride for my DD (4yrs). We've watched this portion of the video so many times since our May trip that my DS (7yrs) nows the entire conversation by heart.