The "thunder" sound effect at the beginning of the opening credits is actually the sound of a tape-echo unit (a type of recording studio equipment) feeding back on itself. If you listen carefully you can hear the "boom" repeating over and over at a rate of about twice per second. The "shimmering" sound effect as the series title materializes from the castle window is produced by the same method, but at a higher pitch/speed.
Scooby-Doo's Creepiest Capers
Join the spook-busting, case-cracking, snack-munching fun as Scooby-Doo and the Mystery, Inc. gang gear up for four of their most frightening adventures ever! Traveling the globe on their ongoing quest to trip up crooks (and chow down on munchies), Scooby-Doo, Shaggy, Daphne, Fred and Velma tangle with a supernatural assortment of eerie adversaries. Facing multiple monsters, ghouls galore and gobs of ghosts, our top-dog detective and those "meddling kids" will stop at nothing to get their ghoul as they confort SCOOBY-DOO'S CREEPIEST CAPERS!
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