Bart: Otto, are you OK? Otto: Yeah. Just pop my shoulder back in.

Related:

• Otto: Get off the bus or forever hold your peace, little dudes!
  Bart: Otto, you know I respect you. I mean, you always...
• Bart: Hey Otto! Hey Otto-man! Otto: Hey Bart-dude!
  Bart: Any new tattoos, Otto? Otto: Ho! Funny you should...
• Apu: Otto, do you know there's a small child inside your bus?
  Otto: [sees Bart] Ooh, good thing you warned me. I...
• Bart: [reading his history book while boarding the bus] Otto:
  Hey, Bart-dude! Whoa, you little freaked! [?] Bart...
• Bart: I didn't know you played the guitar, Otto-Man!
  Otto: Hey, that's all I <did> in high school! ...
• Bart: Otto, I'm going to leap over Springfield Gorge on my skateboard.
  Otto: You know, Bart, as the only adult here, I feel...
• Otto: [humming into the bus microphone] Bart: Hey, Otto,
  can I use that microphone? Otto: Sorry, Bart-dude,...
• Otto: OK, little dudes, time's up. Everybody out! [kids groan,
  leave, except for Bart and Lisa] Lisa: Time's up? Bart...
• Everybody on! No shoving! Hee, just kidding. You can shove all you want!
  Otto, "Bart's Friend Falls in...