When one of the bullies is about to torment Kojac he takes a last drag of his cigarette then throws it onto the ground.
In the very next frame he's smoking again.
During the first case examined, when the night watchman talks to his Russian counterpart on the radio, his coworker says (in a Russian accent), "we have a word for this back home. It is 'zloslivy.'"
The word "zlosliwy" is Polish, not Russian. There is no Russian cognate for it.