this take 2 players, you can do this on any flat wall.

to do this:

both players have your backs against a wall.

have a small space in between you two.

the player to the left looks diagonally left, the player to the right looks diagonally right (should look like this \ /).

both players must jump and hold S and spam jump at the same time (if timing is off or if 1 player has bad ping it may not work easily).

now, when you two are flying up you can stop anywhere and just float there. to do this, you both have to stop moving back and spamming jump at the same time.

one of my friends showed me this glitch, please do not abuse it too much.