Kim Kardashian on why she and Kourtney got into fight: 'I was bleeding'

Kim Kardashian West joined Jimmy Fallon for The Tonight Show: At Home Edition on Monday night where she broke down the physical altercation that occurred between her and her sister Kourtney on the Season 18 premiere of Keeping Up With the Kardashians. The sisters had been arguing when Kourtney threw a water bottle at Kim before going after her. The two briefly tussled before Kim started swinging.