First learn ollieng up curbs and stuff before trying this. Ride toward the beginning of the box like you were going to ollie up on the edge of it. When you get close enough to ollie up on it, do an ollie and make the trucks land on the edge with your toe edge wheels on the box and your heel edge wheels hanging off the edge of the box. It helps to let the heel edge wheels rub against the edge so you can keep your balance better. When you get your trucks on the edge balance the bitch out, I'm pretty sure you can learn that part on your own. To come off at the end do a little manual long enough for your back truck to get off. To come off before the end of the box just do a little manual but turn about 45 degrees so you can get the trucks off and roll away.