Participants pose for a picture during preparations before the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. Enthusiasts competed in disciplines on the longest distance of the flight, on the creativity of self-made aircrafts and on the originality of the performance in an attempt to win the contest, according to organizers. (Photo by Sergei Karpukhin/Reuters)

A participant attempts to control a craft during the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

A participant falls down during the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

A participant attempts to control a craft during the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

A man swings a boy around during preparations before the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

A man looks on while standing near a self-made aircraft before the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

Participants attempt to control their craft during the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

Participants, wearing masks of Russian President Vladimir Putin (R) and U.S. President Barack Obama, pose for a picture during preparations before the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

A participant prepares before the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

A participant attempts to control his craft during the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

A participant falls down during the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

People watch the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

A craft falls into the water during the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)

A craft falls into the water during the Red Bull Flugtag Russia 2015 competition in Moscow, Russia, July 26, 2015. (Photo by Sergei Karpukhin/Reuters)