A freestyle biker performs a stunt during an exhibition show at the Proryv (Breakthrough) extreme sports festival at Luzhniki Sports Complex in Moscow, Russia, December 5, 2020. /CFP

A freestyle biker performs a stunt during an exhibition show at the Proryv (Breakthrough) extreme sports festival at Luzhniki Sports Complex, December 5, 2020. /CFP

A freestyle biker performs a stunt during an exhibition show at the Proryv (Breakthrough) extreme sports festival at Luzhniki Sports Complex, December 5, 2020. /Xinhua News Agency

A sportsman on a scooter performs a stunt during an exhibition show at the Proryv (Breakthrough) extreme sports festival at Luzhniki Sports Complex, December 5, 2020. /Xinhua News Agency

A sportsman on a bicycle performs a stunt during an exhibition show at the Proryv (Breakthrough) extreme sports festival at Luzhniki Sports Complex, December 5, 2020. /Xinhua News Agency

A freestyle biker performs a stunt during an exhibition show at the Proryv (Breakthrough) extreme sports festival at Luzhniki Sports Complex, December 5, 2020. /Xinhua News Agency

Several freestyle bikers perform stunts during an exhibition show at the Proryv (Breakthrough) extreme sports festival at Luzhniki Sports Complex, December 5, 2020. /Xinhua News Agency

A sportsman on a bicycle performs a stunt during an exhibition show at the Proryv (Breakthrough) extreme sports festival at Luzhniki Sports Complex, December 5, 2020. /Xinhua News Agency

A freestyle biker performs a stunt during an exhibition show at the Proryv (Breakthrough) extreme sports festival at Luzhniki Sports Complex, December 5, 2020. /Xinhua News Agency

A sportsman on a bicycle performs a stunt during an exhibition show at the Proryv (Breakthrough) extreme sports festival at Luzhniki Sports Complex, December 5, 2020. /Xinhua News Agency