'Crazy' Superman punch KO stuns UFC world

An insane finish to the main event at UFC Nashville has rocked the fighting world.

A Superman punch from Anthony Pettis rocked opponent Stephen Thompson in the welterweight division.

Anthony Pettis punches Stephen Thompson in their welterweight bout during the UFC Fight Night event at Bridgestone Arena on March 23, 2019 in Nashville, Tennessee. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC via Getty Images)

The incredible lunge had many of UFC’s biggest names taking note.

The knockout marked Pettis’ first UFC win since 2013.

The former lightweight champ’s knockout was a huge upset, with Thompson entering the fight at the third-ranked welterweight fighter.