The entire opening to episode 43.
Joey: How bad is it, Dr. Feelgood?
Dr. Feelgood: He was struck by lightning. In the head. It's not looking good.
Tea: We have to help him!
Dr. Feelgood: Medical science is already doing everything it can...
Tea: Screw medical science, I'm talking about friendship!
Dr. Feelgood: I-I beg your pardon?
Tea: Friendship is the only cure for a lightning bolt to the face!
Yami: That's right! Joey was struck by lightning and now thanks to friendship, he's okay!
Joey: Yup! My brain am thinking good with stuff!
Dr. Feelgood: Look, friendship isn't going to cure this man.
Tea: Silence, non-believer! Go back to your leeches and your potions! The power of friendship and Tristan's beautiful singing voice will heal him!
Dr. Feelgood: You guys are morons. Have fun staring at a guy in a coma.
Tristan: (singing) Lean on me, when you're not strong, and I'll be your friend...
Yami Yugi getting burned:
Yami Yugi: OHHHH! Whoah-ho-ho! I definitely should've seen this coming!
Melvin: (laughs) Yes! Burn, Pharaoh! BURN!
Yami Yugi: Look, I'm burning, okay? I can't exactly burn anymore than I'm doing right now.
Yami Yugi:I'm doing it! Jeez!
Yami Yugi: (passes out) Again, right on my keys...