Two bright lights appear out of no where and make very odd movements in the sky directly above us.

At 12:25a.m. on September 11th, 2011 a group of six adults (myself included) were sitting on the back deck of a house in Grey Eagle subdivision in Fishers, Indiana.  I had been looking at the sky noticing the broken cloud cover on this moonless evening.   Suddenly, directly above us, two bright lights appeared in the clouds...sitting stationary directly overhead.  At first, I (we) thought that it was someone shining some very large spotlights into the sky.  However, I soon realized that this could not be possible because 1) the source and angle would mean that the lights would have to emminate from our current seated position 2) there was no light trail like you would normally see from a large industrial spotlight used to promote a business 3) the more I looked the more it was apparent that the light source was coming from above the clouds and shining through them, not up to them.
 Suddenly the two lights, which appeared to be about50 yards apart, began to move erratically.  They zigged and zagged, moved in circular and linear motions, and then one of the lights disappeared, only to reappear off in the distance, but remained about the same size.  That light then disappeared and reappered back over the top of us.  There was no sound associated with these lights, no smell, no disruption to anything on the ground.  This event lasted for about five minutes.  Then, just as quickly as they appeared, they disappeared.