Thats a sick jump dude.
I know how you feel my 4yo son took his new giant 16" on a 7.5km ride with me yesterday and made it the whole way , he did get off and walk a few of the steepest bits while saying "i hate this ride , i wanna go home!" but then was cheering going flying down the hills , and he was loving it. Even had the missus on her sisters old mtb while i towed the 18 month old and all our gear in a trailer on my bike , was a great ride and only took us just over an hour.
son's been doing the old piece of ply up the gutter jump with the kids next door too , so no doubt i'll be struggling to keep up with him soon!
His new bike is his ktm moto , orange and black with front and rear mudguards he loves it!