Notes:

Translation:

I was lurking around VK this morning when I stumbled upon a live stream by 18-year-old Moscow lyceum student Gleb Korablyov (his VK page has already been taken down by his mother).
Approximately three minutes in the guy shouts "Nyan, bye!", puts a Saiga rifle to his head and blows his brains out.
According to how long the video lasts, the police arrived only 2.5 hours later.