20-metre inflatable balloon mistaken for a UFO in Saint-Denis

Summary

In April 2009, two witnesses in Saint-Denis watched a grey oval object swaying in the overcast sky for about five minutes, producing no sound or trail, before fading eastward. Days later GEIPAN received an anonymous photograph apparently showing the same phenomenon, though taken at a different time and location. The gendarmerie investigation solved the mystery: it was a 20-metre inflatable balloon used as entertainment at a sporting event, eventually taken down by police.