I don't know how to answer this question xD but it was so random and I can't stop laughing xD haha I just had to say that.
In the Scooby Doo episode with the robot clown, I get that Velma was scared but why did she say "And, like, I gotta find the nacho machine before they cancel nachoes" And why did Shaggy say "Jinkies"?
Because the challenge excited them.