Any time Link can attack Cuccos...only to have an endless swarm of killer Cuccoos chase after him in revenge.
Late in "The Missing Link," Ganon states that Zelda is able to see Link's non-corporeal form due to The Power of Love. Both Link and Zelda are in earshot of this. Zelda profusely denies this to Link...
Link: Yes you do!! Yes you do!! *sings* That's why you can seeeee meeeee!!!! *stands up on a ledge to proclaim the glorious news to the rest of Level-9*
The entirety of "The Moblins Are Revolting," where Ganon's army is so incompetent they defeat themselves.
Even the beginning, where they come close to stealing the Triforce of Wisdom as Link reads a comic book, and they defeat themselves easily.
Link: Boy, I'm good.
Link telling the Moblin leader that their plan is the stupidest plan Ganon ever conceived, only to be told that the monsters thought it up themselves.
The Moblin leader tells another Moblin to be careful with the magic staff and to not drop it. When the other Moblin asks him to repeat the last part of the order, he yells "Drop it, stupid!" causing the other Moblin to do just that. The Moblin leader, hearing the staff break, does a Face Palm and muses that now he knows how Ganon feels.
Ganon's reaction when he is pushed into the Bottomless Pit while trapped inside a bubble.