Video: Watch Gunnar Nelson dance to Bieber's "Sorry"

Not only does he fight, he's also a pretty good ...

Not only does he fight, he's also a pretty good dancer! Mbl.is/ Árni Torfason

Icelandic MMA champion Gunnar Nelson proved that he doesn't take himself too seriously when he appeared along other members of the popular Mjölnir MMA club in Reykjavik in a video where he dances to Justin Bieber's song "Sorry".

The video was premiered at the company's annual party on Saturday night. 

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