It's World Trick Shot Day ... and you know who's pumped about that?? The Harlem Globetrotters, which completed the HIGHEST DUNK EVER in honor of the holiday!!
The video is bananas ... Globetrotter legend Hammer Harrison jumped out of a freakin' airplane from 13,000 feet to attempt the record-breaking rim shaker ... and flew all the way down to land the dunk.
Not only is skydiving insane (props to the pro controlling the parachute), but Hammer managed to keep his focus to successfully complete the shot.
But think about it ... WHAT IF HE MISJUDGED THE LANDING AND HIT HIS HEAD ON THE BACKBOARD?