Help with a Double Up

[grayrock15]

Hey.
Does someone want to explain to me how a double up works...
What the boat and the rider have to do to make it work??

[JMay419]

The driver neeeds to make a turn, that isn't real big but also not real sharp, and try to run the boat into the rollers at 90 degrees. The rider needs to cut out and follow the line in and time it to hit either the first, second, or third roller while it's hitting the wake. If you time it right you will buck up in the air!