Yawning

Yawning is a one hundred sixty-fifth episode of the series and a forty-first episode of the fourth season.
== Plot ==
The Hoobs cannot figure out why are they yawning.
Tula started first, then Groove, then Iver and finally Hubba Hubba. Why are all the Hoobs yawning? How can they stop? They discover that there is more to yawning than just being tired.
Category:Season 4 episodes