When asked to draw pictures that describe God, both Eric and Hyde drew pictures of Eric Clapton. However, they had different pictures of which hand Clapton played with. Hyde drew Clapton as left-handed, while Eric drew him as right-handed. Eric's picture was the correct one.
Eric refers to Fonzie "Jumping the Shark". That would mean this episode takes place after the "Happy Days" episode titled "Hollywood: Part 3", which aired September 20, 1977.
Tommy Chong and Kevin McDonald co-starred in 1995's "National Lampoon's Senior Trip".