Hovering craft with strobe lights about the Indianapolis Airport.

I was driving out of the Indianapolis airport tonight and saw what I thought was a plane coming in.  The odd thing was that this craft had an unusual configuration of lights.  I kept looking up at it when it appeared to stop and hovered.  Then a bunch of lights came on and started to 'strobe'  Lights were quickly flashing on and off.  This lasted for about 5 seconds then everything went dark and I could no longer see it.  I was alone when this happened.  I did notice that the other cars in front of me had put on their brakes and slowed while this was happening.  I cannot imagine what kind of craft would do this.  It was all very odd.