Shred! 2 - ft Sam Pilgrim

Choose “Special Stage” from the main menu then “Shred 1 Redux” then the second level “Boner Yard.” The very last jump on this stage (you will do an open loop, then jump on to a wooden plank and then jump off the wooden plank, the last jump is the one off the wooden plank) offers a significant amount of airy time.

This also works easily on the last jump in “Air Compound” which is the next to last level in USA.

Just hold (to spin), (to backflip), and the right stick in any direction (to trick) and land it. You should easily be able to get 150k++