Ollie
Why does my back foot lose contact with the tail?Lift Your Body Before Lifting Your Foot
Mechanism / Why It Happens
You can't gain airtime by simply popping and pulling your front foot up
Lifting the front foot high is essential to lift the tail. But simply pulling up your front foot does not move your center of gravity, and you will not gain any airtime, keeping your Ollie low.

What to Do
Everything starts with good jumping using both feet
Once you jump, you'll be able to lift your front foot with your body weight. Note that, if you lift