Pop heartthrob Justin Bieber has reignited his feud with Tom Cruise, whom he earlier challenged to a UFC fight, executing a spinning back kick in the Bottle Cap Challenge and warning the veteran actor it "could be his head".
In the video, uploaded to Instagram, a shirtless Bieber began his attempt at the viral challenge by declaring "This could be Tom Cruise's head" before sending the bottle cap flying into the air with a spinning back kick, all while keeping his baseball cap expertly in place.
The Canadian singing sensation had earlier inexplicably called out Cruise for a fight in the UFC octagon, despite the two rarely if ever crossing paths, with former two-weight UFC champion Conor McGregor then bizarrely offering to host the fight.
The Bottle Cap Challenge has seen a host of sports stars take part, perhaps most notable of all coming from McGregor himself, who challenged Floyd Mayweather while drinking a bottle of his own brand Proper 12 whiskey.
It has also seen those on the very periphery of the sports world get involved; Russian 'slapping champion' Vasiliy 'Dumpling' Kamotskiy released his own version of the challenge, predictably knocking off the bottle cap with a sweep of his giant hand.
His female counterpart, Nastya Zolotaya, the women's 'Booty Slapping Champion', also offered her own steamy version, knocking off the bottle cap with a swift buttock movement.
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