Having worked with a lot of Russians/former Sovjets, I can see this happening.

They're often serious in most endeavours ("work hard play hard", "smiling is for leisure time" etc), and this extends to disagreements IME.

There was one incident where two (white collar adults) had a fist fight over a seemingly minor issue. I was mortified (Swede), but they were fine? As in the fight settled it, and they were now pals again.

Alcohol was included.