The Booster Fall Dampener is a module of the Boosting locomotion; it provides a particular functionality for its parent Booster. If it is disabled or removed, then the relevant boosting functionality will behave as by default. Most modules can optionally affect change globally (for both hands' Boosters). Booster modules can also depend upon conditions specified by their dependencies settings.
This module handles fall dampening. With fall dampening on, less force will be required to thrust against descent. Fall dampening dampens the player's downward velocity while they are boosting against the downward direction (within 45 degrees). You can toggle fall dampening and also tweak the amount by which to dampen falling.