The Snark-to-Snark Combat between evil Phoebe and Destructo in Thunder in Paradise. Of particular note is when Phoebe finds a suitcase full of Malvexium.
Near the end of "Thundermans: Banished!", Mrs. Wong has just fixed her restaurant, only for the recently defeated Candi to come crashing through the ceiling.
Mrs. Wong: I hate this town!
Candi: (pained tone) Me too.
When Principal Bradford asks who called the school board on him in "Super Dupers" every student raises their hand.
Max and Phoebe also makes fun of Bradford with his shorts.
Majority of the dinner party in the second half of the episode "Dinner Party".
Hank drinks Nora's soup. He then does a Spit Take on Mrs. Campbell and then tries to take out the taste by drinking the water from the flower pot and then spits onto Mrs. Campbell again.
