Nailing the S bend? Good. Then you're ready to stick a double S bend. You just need a little bit more height, which you can gain fom either your pop or from the kite. Either ride in faster and pop bigger, or have the kite slightly higher.
The technique is the same as the S bend, but you continue the rotation so that you do two frontside spins.
Common mistake is not having enough height. We suggest learning this trick with the Kite quite high, then once you're comfortable you can start going for them with a more powered kite.
Disclaimer: neither of these videos are particularly professional level S bends. We are strongly encouraging someone to make a better one! However, they are adequate for the learning process!
Go downwind and unhook with your hands very central on the bar and your Kite slightly higher than 45
Edge hard and pop, try to get your legs as high as possible and a little bent
As you leave the water, throw that front shoulder down and look over you back shoulder keep looking over your shoulder throughout the rotation
As you are going into the second rotation, your legs will start to drop
Spot your landing and try not to feel too dizzy!
Pull the bar into your hips to make for a balanced and comfortable landing
Land going downwind and do a huge double bar spin to celebrate