Another blast from the past, but you gotta love Scooby! I was a lighting TD for 10% of the shots (including these). This was one of the first uses of Image Based Lighting in a film. It was a great experience working for Rhythm & Hues, the best studio I've ever worked for.
BTW, the fart sequence won the Nickelodeon Kid's Choice Award for Best Fart Sequence that year. The other clip is Cowabunga :).