William Pollock felt ill on the Magic Kingdom water ride, so he climbed out of the log-shaped boat and stood along the canal, among the animatronic Brer Rabbit figures.
To get off Splash Mountain, Pollock had to cross the canal.
"I'm going to try to cross here," Pollock told log flume riders Sunday.
As Pollock stepped on the boat directly in front of theirs, it lurched forward. He slipped into the water and was struck and crushed by the next boat, said Bernie Presha, a spokesman for the Orange County Sheriff's Office.