There was a remarkable display in the skies above Calgary, Canada on the night of July 17, 2009. The video below captures the excitement of this event.

 

A second video taken by a separate witness in another area of the city shows a different view of the event.

 

Witnesses are discussing the possibility of an air show - yet there is so far no indication that there was any air show occuring in Calgary on that summer night.

Source: YouTube