Allows you to sprint forward incredibly fast to allow you access to areas not otherwise accessable.
Location 1 (High Hrothgar):
You can learn this ability through the story line by going to High Hrothgar and do the objectives that the Greybeards give you.
Location 2 (Dead Mans Respite):
Dead Mans Respite contains a part of the shout which is to the west of Morthal. You will need to pick up the ruby claw on the table after you enter. At the end of the dungeon you will fight a few waves of dauger with the ghost and then finally the king. After defeating the king the shrine can be found behind his coffin.