In Scooby-Doo and Guess Who's "A Run Cycle Through Time," at one part in the episode, Velma appears to be riding a unicorn on the carousel time machine in close up shots. However, in long-distance shots, she is shown to be riding a bicycle.
In addition, as a minor bonus fun fact, the days of the week given for each of the dates are incorrect. July 9, 3535 is a Tuesday, not a Thursday, and October 10, 4646 is a Saturday, not a Friday as it is said in the episode.
~ WildwindVampire ~