Shark Blast is a minigame playable in the Underwater Area of Pocket God. It makes use of the built-in accelerometer in the device. Shark Blast was introduced in Ep 25: Sharks with Frickin' Laserbeams Attached to Their Heads.
To begin the Shark Blast mini-game, Take out a piece of bait. The Shark with Laser Beams will come. You have to blast as many pygmies as possible by moving around the target with the device's accelerometer while keeping the Shark there with bait.