For those of you guys who have tried landing a heelflip or don't know how to do them, here is an easy guide on how to heelflip.
Step 1: Get in Ollie Position
The first step is to get in an Ollie position. But instead, you need to have your front foot's toes hanging off the edge. Have them pointed forward.
Step 2: Get Ready to Jump
Bend down as far as you can. This is so you can jump high in order to get the whole rotation.
Step 3: FLICK!
When you jump up, pop the nose of the board up with your back foot. Use your front foot to flick the board. You need to flick your foot out diagonally towards the nose and down.
Step 4: Continue to Jump Up
Continue to jump up.
Step 5: Spread Legs Apart
Bring front foot back up after flicking and keep your legs as far apart as possible. This is so your legs don't get in the way.
Step 6: Wait for It!
Wait for the board to rotate.
Step 7: When Your First Learning...
When your first learning you might want to put your feet together. This is so that if one foot makes it on the board, the other one should, too.
Step 8: SLAM!
When you see the grip tape come right side up, SLAM DOWN! You need to land it one way or another.
Step 9: Land It
Land on the board.
Step 10: Absorb the Shock!
Bend down so that your feet and legs absorb the shock.