when a person jumps up in the air...they go up and down there is no pause...their horizonal velocity stays the same as they rise and fall they cannot control it..no human can really be air born for more than a second.
as you can see in this video of me high jumping...with the right timing and practice i was able to clear the bar because i jumped a little before the bar and my momentum and forward horizontal velocity carried me over the bar as i jumped up high as well
also in this picture i was able to jump over Laurie without touching her because she trusted me and i had the right timing and hops to do this!!