Experience in Acrobatics is gained by successfully dodging or rolling.
When you fall you gain XP based on the distance traveled as long as it is not fatal, falls from near-death heights will reward the best experience, make use of Graceful Roll to take less damage!
Acrobatics does not currently have a super ability.
Rolling is an active Sub-Skill with a passive component.
Whenever you take fall damage you have a chance to completely negate the damage based on your skill level, at level 100 you have a 50% chance to prevent damage, and 100% if you activate Graceful Roll.
By holding the sneak button you can double your odds to avoid fall damage and avoid up to twice the fall damage! Holding sneak will transform a normal roll into a Graceful Roll.
Rolling will not activate if the fall would have been fatal.
Roll and Graceful Roll used to be considered separate skills until 2.1.0 when they got merged.