strange alien musical number

[superboober]

I recall this bizarre piece on an alien planet. A strange conductor orchestrates a series of fellow alien musicians that appears one at a time, namely, to the best of my knowledge:

-a thin light brown creature with a long snout that make a spring-like sound
-a large green frog-like blob that makes a trampoline like bouncing noise; there seems to be an abrupt film splice just after it appears, as one minute it's on the first creature's right (our left), and the next minute it's on it's left (our right)
-a yellowish thing with what I think was a trumpet-shaped nose (but making a pounding sound)
-a large brown guitar-shaped creature
-something similar to a large red centipede
-a large purple slug

All these play together for about a minute together, then walk away one at a time (with the green blob abruptly splicing back to the left side of the screen again before bouncing away), leaving us with creepy overture music. Anyone else remember it/