Here's a kind of funny, embarassing and painful shocker that happened to DW and I at EPCOT during the F&WF. I'd had a heart attack on the plane flying out to Orlando so when we finally checked into the Poly Concierge, the nice concierge folks gave us a wheelchair for my use during the entire stay.
Lets just say at the time I wasn't all that experienced in controlling a wheel chair so I clipped my share of poor victim's ankles, ran over enough toes to fill a small barrel and generally wasn't that great at getting around. Not having a lot of stamina helped too. So if you got "Clipped" at EPCOT by some nut in a wheelchair... Mea Culpa! And apologies.
Getting up and down the hills between the Rose and Crown and France was proving problematic, as my wonderful DW had to push me up hill. Not an easy task with me being of pretty good girth. Anyway she gets this idea about racing down one hill to get me over the next.
So picture this: We leave France and we race up the first hill and zoom down into the valley, make it up the second hill and over the top and we really start zooming down the decline towards the Rose and Crown. Now those front little wheels are buzzing and vibrating away and whole chair is shaking like its gonna fly apart at any second. I tell DW that aren't we going a bit fast. No response from DW. I look back and she's face down on the pavement with both handgrips to the wheels chair still in her hands. I look forward and see I'm on a high speed collision course with the iron fence. I momentarily try to grab the wheels then remember the brakes. So I gently put them on - harder and harder and was able to stop inches from that iron fence.
Meanwhile my poor DW comes limping over, scuffed hands and knees and says she thinks she may have broken a kneecap when she took her "header" into the pavement. We stopped at the R&C for cleanup and recovery. After 6 Boddingtons each we were both all smiles again. Turns out she didn't break anything but did get some nasty scrapes. My DW looks cute on the outside, but man, she's all steel inside.

She comes from a Marine Corps family and it shows. She rocks!
Thats one wild ride I don't wish to repeat.