I was on a Russian flight once from Chelyabinsk to Moscow (this was my flight from hell) and a group of Russians got plastered from the bottles of vodka that they were passing around and got extremely belligerent. It didn't help that the flight was over an hour late in boarding and then sat around another hour or so before take-off. The flight attendants just disappeared at one point and hid for most of the flight. I did my best to make myself invisible. Ahhhh. anotehr fond memory of living in Russia.
