Five giant snowflake-shaped structures suspended from the roof of the Fisht Stadium on the shores of the Black Sea in Sochi were supposed to open into circles and then light up with pyrotechnics.
Only four opened, and that particular feature, near the very start of the 2-1/2-hour opening ceremony, was abandoned.
Russian President Vladimir Putin has staked his reputation on staging a safe and successful Games, despite threats from Islamist militants to disrupt them.
Almost... One of the #Sochi2014 rings fails to display properly pic.twitter.com/RwKtAerLof— Thomas Watkins (@thomaswatkins) February 7, 2014
Almost... One of the #Sochi2014 rings fails to display properly pic.twitter.com/RwKtAerLof