What happens next?

How to perform a back dive with a half twist
Walk to the end of the board, watch the water behind you (this is optional), and turn your back to the water.
Stand on the balls of your feet.
The first times you try this dive, start with your arms straight above your head and close to your ears.
Drop your arms to your sides while bending your knees. At the same time, swing your arms back up to your ears and push off the board.