Bright object emmiting a spot light/ dissappeared as if someone flipped a switch/ spot light facing West turned 90 degrees to the North

I was driving northeast on highway 89, about 5 kms outside Mount Forest, and I noticed a white light in the sky Eastnortheast of me.  I just assumed it was an airplane at first.  Then it started shinning what looked like a spot light from the west side of the object.  
At first I thought it was an airplane`s landing lights.  Then I realized the spot light was parallel to the ground not on a downward angle like all aircraft landing lights I have ever seen.  This is when I started to get curious to what I was looking at.  From my perspective the object didn't appear to be moving but I was moving at about 90km/h that may have skewed my perspective.  It remained like this for about two minutes then the spot light quickly and smoothly turned about 90 degrees left from my perspective and was facing North.  About 5 seconds later the bright object and the spot light it was emitting were just gone.  As if someone flipped a switch. I was admittedly startled at this point.  Then my GPS unit began to act up trying to re-route me North adding a long detour to my trip I tried to reset it a couple of times and ended up shutting it off.  I knew where I was going and I knew the routeam I just had it on to track my arival time.