Vitalii Sediuk is a 28-year-old Ukrainian media reporter who is known for his many celebrity-related pranks. On Saturday, during the Eurovision Song Contest and in front of millions of viewers around the world, Vitalii jumped  on stage – and mooned his ass.

Vitalii Sediuk Eurovision mooning
Photos: Instagram / YouTube

Presenting himself as an entertainment reporter, Vitalii ran “pranks” on several celebrities in the past, usually after gaining access to premieres and media events.

At one time, Vitalii tried to kiss Will Smith on the lips – and got slapped for it. He also rushed onto the stage during Adele’s Grammy Awards speech, and he once buried his face in Leonardo DiCaprio’s crotch… and there were many other pranks.

😎 #parisienvibes

A post shared by Vitalii Sediuk (@vitaliisediuk) on

This week, during the 2017 Eurovision Song Contest, Vitalii jumped on stage while last year’s winner, Jamala, was in the middle of her performance. Vitalii was wrapped in the Australian flag, so many thought he was from there.

At that point, Vitalii lowered his pants, giving us all a quick glimpse of his ass. Security guards quickly jumped him and removed him from the stage.

You can see it happen right here: