During the episode where the gang finds the 'headless specter', after they start looking for clues, they find 1 pair of footprints that go in two different directions. Freddie says "Wow, I've seen guys do the splits before...". Anyway, then there is a commercial break. When they come back, you seen Velma, Scooby, and Shaggy following the footprints. But, instead of just prints from one foot, they follow a complete set of footprints.