The EntityLivingFall Event is fired whenever an entity is set to be falling.
It can be canceled to preven the entity from falling.

You will need to cast the event in the function header as this class:
crafttweaker.event.EntityLivingFallEvent
You can, of course, also import the class before and use that name then.

EntityLivingFallEvent implements the following interfaces and are able to call all of their methods/getters/setters as well:

• ILivingEvent
• IEventCancelable

ZenGetter	ZenSetter	Type
ZenGetter distance	ZenSetter distance	Type float
ZenGetter damageMultiplier	ZenSetter damageMultiplier	Type float