Toss trick with a Glock

Its back to work for the new year, but its only Humpday. And, its really dragging, my trigger finger is itching to get back out on the range, must be withdrawals.
For this fellow gun hobbyist, he already beat me to the range and has a new trick with his Glock.
What he does is put a round on top of the slide (locked back) of the glock. While holding it, he tosses the round up into the air and have it land into the open port.
Release the slide forward to rack one into the chamber and fires a shot.
Yeh, it looks pretty cool!
Definitely, beats the water bottle flip challenge.
https://youtu.be/FiIBzYiq7Wo

Sources: Vid @combat_tactics, @zach_stimpson, Everyday No Days Off FB