The moment the upper half of that fucking Bouncer hit the floor, there was this three seconds of silence before Mikhail's roar shook the surroundings. It was just a liberating feeling just to let loose and break things after recovering from an injury—and having a large target to boot—and even Artem who he stole his kill from didn't even care as he was just happy that one of his boys came back in the best way possible.
It was a mutual kill, if anything, because Artem had already worn it down from the back—just enough for Mikhail to land the final blow.