I've never been a fan of rollercoasters, but this sealed the deal for me. Two friends get on a rollercoaster together but the lap bar holding them down in their seats isn't properly latched. When the ride goes over a hill, one friend goes FLYING off the ride and falls to his death in front of hundreds of people. The ride stalls with the cars hanging upside down and the other friend is left hanging from the lap bar. Buck attempts to urge the man to reach up and grab his safety strap, but he freaks out from all the people watching him below and lets go of the lap bar, falling to his death. The crew is able to save the other riders, but those two deaths were hard to watch.
The floor beneath a wedding collapses and the entire party falls into the wreckage below. Apparently the wedding was being held on a makeshift third floor, made with illegal materials that were obviously not strong enough to hold a crowd of that size.