jensen kimmit trick?

hello there, ive been a big fan of jensen kimmitt ever since i started yo-yoing, and he does this one trick which amazes me everytime and i really want to learn how to do it, -From 0:15-0:17,

does anyone know how to do the trick and able to provide any tips on it or the trick name or any trick similar to it because its one of the most amazing things and i always love to see him do it.