Some friends and I saw a similar thing while camping on Mt. Rainier back in the ‘80s. One of us noticed a light moving far up in the night sky, and we all watched it go over, presuming it to be a satellite.
When it was directly above us, however, it made an impossibly sharp right angle turn, then accellerated into the distance.
We just sort of laughed in awe and shrugged our shoulders. What else could you do?
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