Gear Rising is an old glitch where Trish raise at the air endlessly disregarding the invisible wall. Extremely useful as it skips the water platform puzzle section in Mission 8 Lucia's Disc.
How to perform
Hold Shoot + Melee buttons, jump and Trish will be shooting in the air. Release the melee button and the inertia of the jump is slowed down. Paired with DT on/off, she can rise all the way into the sky if the level allows it! She can also hang in the air for a long time, and descend very slowly.
For best results, unequip the Sparda sword first Hold Melee + L2/LT, then release Melee or just throw it with Round Trip