This teaches you how to do a ladder climb. The only key being pushed here should be
forward. No jumping, no crouching. Grab one rung, pull up slightly, then let go
of forward to fall back down. Immediately after letting go, press forward again to
grab hold of the next rung. A good strategy for beginners is to
climb two rungs at a time, then drop down a rung, climb two more, etc. The demo shows
this. If you keep pressing forward as you are pulling up on a rung you will fall all the
way down. If you are falling down often, you should probably be letting go of the climb
sooner.