Moments later, he was seen clasping his stomach in pain before collapsing to the ground, to the horror of onlookers who had moments earlier been laughing, the report said.
Guests were left in disbelief as medics arrived and attempted to treat him at the venue.
Sergey was rushed to hospital where he underwent emergency surgery to reconstruct his torn stomach.
Doctors later confirmed Sergey experienced a rapid expansion of gas inside his body after the liquid nitrogen vaporised, creating extreme internal pressure that ruptured his stomach, the Mirror reported.
Liquid nitrogen boils intensely at room temperature, expanding hundreds of times in volume, which makes it extremely dangerous if swallowed, according to Metro.
The sudden expansion can tear the stomach lining, cause internal bleeding, and freeze surrounding tissues.
Metro reported that there have been several reported deaths linked to its consumption and its use in food and drinks is strongly discouraged and heavily regulated in several countries.
The Mirror reported Sergey was conscious and recovering following surgery, although his condition remained serious.
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