Tarzan tree-trick cut
The hardest shortcut in the guide: after a super mini-turbo off the wooden road, ride the rock strip, wall ride under the first tree and chain tricks off three trees to fly over the water and the big off-road patch entirely shroomless. Coin dependent (five or more coins recommended on Swoop/Rob Hog), but the biggest time save on the track and it turned Cheep Cheep Falls into a front-running track.
Final two mushroom cuts (6-second combo)
On the big turn on the eastern part of the track, drift early onto the sandy section and mushroom-boost the moment you touch ground, carrying the boost around the corner and releasing the mini-boost on the far side.
Start off-road wall cut
A cut at the start that is faster than going around even if you miss the optimal rail; the creator says not to bother learning it deeply.