Down in the Dumps is the third part of the 17th episode in season 2 of Dexter's Laboratory, which aired on November 5, 1997. In this episode, Dee Dee uses her stuffed teddy bear Mr. Fuzzums to annoy Dexter. He then takes the stuffed animal on a pretend trip, which causes Mr. Fuzzums to land at the city dump.
When Dexter launches Mr. Fuzzums out of the lab through the chimney, the driveway is not seen, but when Dee Dee is seen going to get Mr. Fuzzums, it reappears.
Dexter jokingly says "Da da da dum..." at the end of the episode as a "suspense effect"