The Alaskan Thunder Fuck (ATF for short) strain originates from the Matanuska Valley in Alaska. As a a Sativa, this strain really only affects your head and is a popular choice of many for recreational and medicinal uses. ATF is known for its ability to create a soaring, cerebral head-high. It can definitely take your mind for a ride, so you may want to start with low quantities (1-2 puffs), especially if you are new to this strain.