This is just pure chaos.
At an MMA event in Moscow, Uzbek fighter Namazan Samiev won his fight and during the post-fight interview, challenged the people at the venue to fight him.
Someone from the stands took him up on his challenged and was met with an unexpected knee to the head. After that, a number of people came into the octagon leading to an all-out brawl.
Check the chaotic video below.