Me and my girlfriend were at the window and saw this amazing swarm of UFO.I think that's what it is! At first i thought it was a flock of birds but what caught my eye was that they were flying in a pretty amazing formation.As a hobbyist skywatcher i always have my binoculars at hand and WOW,i could not believe it!Went to find my camera while my girlfriend was shocked with her binocular sight.It disappeared as balloons in the wind out of our sight.