Slap Happy is the episode 21b of second season.
plot
Lumpus fears that Lazlo discovered his secret handshake.
travia
When Lazlo and Lumpus are in Jelly Cabin and Lumpus shows him the new handshake, he's wearing his usual uniform, but after a while, when Lazlo tells him to "shake hands with Melvin", Lumpus is wearing his grand legume costume and after that he's wearing his old uniform again.
After Lumpus throws his club hat on the ground. Later, it closes up on his face with the hat on his head.
notes
According to the calander next to Lumpus's bed this episode happened on june the 18th
12 million Kudo-Beanie-Cise videos were shipped by Lazlo.
We learn Lumpus's secret handshake
quotes
Lazlo: Wow then what do I do? Lumpus: Then you show it to your friends. Lazlo: Then we ogg! (Lazlo then slaps his palm onto his forehead)