Goof: When the gang meet Rudy on their plan to play hooky, Bucky is seen speaking with Bill's voice.
Goof: Dumb Donald chooses not to play hookey with the gang, but he's later seen when the gang nearly collide into the junkman on their skateboards, and then on their makeshift bobsled afterward.
(After the gang crash into a pile of dirt)
Bucky: I don't know about that old boob-sled.
Rudy: That's "bobsled"!
Weird Harold: They way you drive it, it's a boob-sled!
Song: Playing Hooky.