BEST VIDEO EVER!!!!
15-year-old Tim -- who has no arms -- was nervous about trying to hit a 20" box jump at the NubAbility Camp ... you can see it in his face.
But what you also see ... SHEER DETERMINATION!!!
Check out this incredible footage of Tim and his team of trainers and spotters encouraging the kid even after he stumbles on the first two tries.
Did Tim give up?! HELL NO!!! He pushed and pushed and pushed and HIT THE JUMP!!!
Good luck trying not to get emotional .