Movie 1.

The video shows a Pacific white-sided dolphin (Lagenorhynchus obliquidens) during the underwater and aerial phases of a spinning leap. Underwater, the dolphin initiates a slow spin while swimming vertically toward the surface of the water. In the aerial phase, the dolphin leaps vertically about two body lengths above the water surface and increases its spin rate to 617.2 deg s^-1 before falling back into the water.