liftoff

laukaisu, lähtö puhekieltä The point in the launch of a rocket or an aircraft where it leaves contact with the ground.
The point at which a person or animal leaves the ground, as for example when jumping.
2011, Robert Strauss, Daddys Little Goalie'' (page 53)

As she was on her approach to the hoop, taking that first Jordanesque liftoff step, her mouth guard fell floorward. Undeterred, she kept going up with the ball in her right hand.