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In what may be the worst wedding toast of all time, a guest was severely wounded after shooting himself in the head while playing Russian Roulette with a supposedly unloaded gun during a speech honoring the bride and groom, the Daily Mail reports.

A friend of the groom can be seen producing the gun and asking for volunteers to play Russian Roulette in a home video making the rounds on YouTube.

When another guest took the offered gun and pulled the trigger, however, he can be seen collapsing after firing a rubber bullet into his head. Stunned guests can then be seen scrambling as the camera jerks away.

The toast-maker, identified by London's Telegraph as a 33-year-old Chechian man, was arrested despite his claims that it was a prank gone wrong. He says he thought he had emptied the gun of bullets.

Local police have opened a criminal investigation.

Doctors managed to remove the rubber bullet from the victim's skull, but he suffered brain damage and paralysis, the Daily Mail reports, quoting Russian media accounts.