system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: As someone who has never skateboarded in my life, I don't understand how jumping off the deck pulls the whole board up with you. Every time I see this it's black magic to my brain. How does this work?

EDIT: Wow, thanks for all the info!
gpt
Think of it as though the surface of the board is covered in sandpaper. It's all scratchy, right?

Now, pop a wheelie. The front of the board rises. The front of the board is now higher than the back of the board.

What the skater does next is, he jumps with the foot at the back, and at the same time, slides his other foot forwards. The friction of his foot on the 'sandpaper' surface of the board catches on it. And because of the angle and direction that the friction is being applied in (forwards!), this forces the back of the board to lift to try and be level and move forwards as well.

Get a piece of paper, and have it sit on the ground so that one edge is touching, and the other edge in the air. Now push your hand against the top of the paper in a sliding motion. If you get it just right, you can force the back edge of the paper to lift up so that the paper is flat, before it falls back to the earth.

This is what a skateboarder is doing with their feet.