I was on a Bulgarian flight run by the national carrier at the time, just after the fall of the Berlin Wall.
The plane was basic, you could see the rivets in the metalwork, none of that fancy panelling you get these days. It wasn’t that full and we hit some turbulence. The air hostesses reaction was to break out the red sparkling wine (and when I say red I mean deep crimson red - never seen or tasted anything like it before or since) and the Russian ciggies.
Russian ciggies were back then and probably still are, the most rough heinous things known to man, they might as well have been filterless. The whole aircraft was thick with acrid, yet vibrating smoke (due to the turbulence) within a couple of minutes,
Quite bizarre when I think back on it
Nobody quite like the former soviet countries back then for lack of safety and ignoring risk