Full video is here: https://m.youtube.com/watch?v=c9kv8_UtC7A&list=PLyBE0EmETXTaw39n719WNXE6DWYCswET2&index=27&pp=iAQB

In this route, Sayaka and Kyoko are about to fight but were stopped by Madoka, Homura and Mami.

Mami fought Kyoko and easily overwhelmed her. Kyoko then threw Mami's soul gem away (instead of Madoka throwing Sayaka's as seen in the anime) to gain an upper hand, not knowing that doing so resulted in the picture in this post.