do you mean that ya buhau doesn't mean 'nice to meet you'?

I believe they are russian recruiters... for some sort of secret services - and this was kinda outdoor training for recruits. Though I don't know if those guys passed it or not.

Den, don't listen these guys. They don't teach you any good things. Believe me.. ^_^

eeehh, we forgot to practice a lot more important words - dermo and zhopa :((
It'll be your homework. You have to do exerсises and upload a video report till the next week.

Uh. Just one year in US and you forget your native language. No problem. Looks like we should give you a few drunky russian lessons when you'll arrive Moscow. Man, soon i hope you'll get what is it all about...

ya buhau... ya ochen buhau... ya dosvidania... vodka, vodka, pivo... #$^%@^&^%^%#@!@... hey, where am I?

Wow... We are ready to repeat such drunkly russian lessons again :)