Step 1 - Super Massive Galaxy.
Step 2 - Go to a section of the level with 3 giant koopa troopas walking around a planet (it's the second section of the level FYI)
Step 3 - Long jump onto one of the turtle's backs and just bounce. Stay on the back and eventually earn a 1 up per bounce.
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"Don't freeze up girl, you're looking quite a sight." - Adam Ant.
"Baby, can you dig your man? He's a righteous man." - Larry Underwood