Brachiation

BRACHIATION
Type: P Action: Auto
Range: Self Duration: Always

It flies through the air with the greatest of ease. The critter can get around by swinging from grip to grip. As long as there are plentiful hand-holds (or tentacle-holds, or what have you), the critter can move at a walking, running, or sprinting speed while swinging, using the rules for those movement speeds. If there are few hand-holds (or what have you), the critter’s brachiation speed is halved.

(p188 HS)