Super jump:
Press A + B + D-pad to jump farther on the "Dr. Monroe's Hop, Skip, and Fry" section.

Hint: Easy money:
Jump twice as high as the Juggernaut's head during the "Captain Lance Murdock's Skateboard Crash And Bash" sequence. Collect the skateboard, then intentionally lose twice. Knock the Juggernaut off its platform to collect over $7,500".

Hint: Hidden skateboard:
During the "Captain Lance Murdock's Skateboard Crash And Bash" sequence, ride at full speed and jump over the Juggernaut to find a hidden skateboard.