CotT: Mockingbird vs. Hawkeye
Hooray it's Mockingbird! She's one of my favorite 4-star characters, and it's great fun to see an enemy punished heavily after an enormous enemy cascade. Hawkeye rather petulantly decided not to go wild and crazy on the cascades during my fight, so I only managed one free opportunity attack. However, that attack happened to be bombshell, so when the Bombshell's bombshell went off, it was lights out for Hawkeye.