Tips for keeping feet on flat pedals... cleats enable you to pull the rear of the bike upwards with you, which can cause you to over rotate in the air. When you're riding up a launch your heels should be dropped a bit. As you go off the lip you jump upwards and toes naturally point downwards - just like you'd do on land. Try the rear wheel lift on flat ground and feel how you bring the bike up with you with toes pointed down. This movement of the feet on flats applies a lot of the grip which allows the bike to stay with you in the air. In the same way, as you become more comfortable with jumping, you will start moving the bike around in the air: pulling the bars towards the waist, pushing the front down onto the landing a slight whip or laying it over a bit. Because you are adding an external force between pedals pins and the rubber sole with these movements, it means the bike has a tendency to stay with you - and as a bonus it combats the dreaded dead sailor flying technique . Also realise that there is a force between your hands and your feet especially as you push forward off a drop. The rubber soles are pushing backwards on the pedal pins and your hands are pushing forward on the grips. This keeps you in place too. Good luck!