Skipping the Gravity Suit: Hydro Access Tunnel

Discovered by

Amasawa

Notes:

Try rocking the Analog Stick up and down as you charge a Boost, then release the Boost when you are in between up and down.
Hold the Analog Stick in whatever direction you were rocking it toward when the first Boost started, then Boost a few more times to make it through.
As an alternative to holding the Analog Stick in a direction after you get the first Boost, you can try Boosting very quickly, as shown below. The goal is to Boost again before the Morph Ball stops moving down.