The flashback scene in which Josh and Emily are caught having sex in their car is taken from the Pilot short.
Emily is revealed to be of Mexican (or at least Hispanic) descent.
David Hasselhoff makes a guest appearance in this episode as just himself.
Clap Like This was also an arcade game shown in J.G. Quintel's previous cartoon, Regular Show. It can be seen in the background in the episode "Just Set Up the Chairs" as one of the many arcade games locked away in a building at the Park.