The episode where Satoru is cursed with bad luck is one giant example. He suffers from improbable, near lethal slapstick. Later he puts on a bunch of good luck items, which make him look so ridiculous that there is for once an excuse for why the bad guys don't attack the team during the roll call - because they are laughing their asses off, and continue to do so after the explosion that follows the entrance causes Satoru to catch on fire.
Natsuki's Cinderella reading at the beginning of 26: Attack.
Also, Task 35, where Satoru and Morio trade places to thwart a trade of a Precious by the Dark Shadow. Since Morio is in Satoru's place with the other Boukengers, he does even the henshin and team poses along with the team! It has to be seen to be believed.
Shizuka + Rainbow Cloth + Truck Transformation + stopped from running over Souta by Eiji + Eiji adjusts his balance = Crowning Moment of Funny.
Task 21. There's just something ironic about Natsuki saying that Masumi and Eiji are the ones acting like kids...
Earlier Task, Satoru makes a pun which causes a Beat, followed with Morio saying that it makes him sound like an old man, then the rest laughs at him.
Sakura's earliest focus episode contains this funny line when she tried morphing to convince a kid, only for the said kid to run away. Her response:
Sakura: At this rate, I'll not be Bouken Pink, but BokePink!
Satoru's Heroic BSOD when he failed an Adventure School (although it turns out his result was swapped)