Of course, not. It is not absolutely seriously russian school pupil learn AK riffle and take exams by disassembly and assembly AK at a time. No, no. Just joke. People break a bottles on their heads just for fun, nothing seriously. Russia is country, there a man may asked for even any his word and he will responsible in all meanings. (Don't worry, it doesn't apply foreigners. Most often.)
Oh, i almost forgot. Russia is country, where no one smiles you in the street. Boo!