Be able to stay in the air with the jetpack and FLY AROUND with it. Look at the gif, that’s it.
YOU WILL NO LONGER JUST KEEP GOING UP UP AND BEYOND IF YOU USE YOUR JETPACK FOR TOO LONG.
You can also use your alternate jump key to thrust forward, you will slowly go down if you use the jetpack for too long until you eventually get to ground level.
Credits:
Moises