UFC on ESPN+ 37 video: Joaquin Buckley's insane back kick delivers 'Knockout of the Year' contender

Joaquin Buckley scored one of the most incredible knockouts in UFC history against Impa Kasanganay on Saturday at UFC on ESPN+ 37.
Buckley (11-3 MMA, 1-1 UFC) landed a spinning back kick off a caught kick in the second round of his middleweight bout with with Kasanganay (8-1 MMA, 1-1 UFC), and it put him out upon impact at Flash Forum in Abu Dhabi.
Kasanganay froze when the shot landed before crashing to the canvas. Watch the video of the incredible finish below (via Twitter):
Kasanganay stiffen