I've seen my share of "weird shit in the sky". I've seen a bolide in broad daylight, which was literally a "holy shit drop to your knees in awe" moment, but I've also on a few occasions seen patterns of lights moving in impossible fashions - high speed motion, instantaneous vector changes, followed by insane acceleration and disappearance. They're usually orange. An explanation I've heard for this sort of thing is car headlamps reflecting in a temperature inversion - but the last I saw these was while camping in the taklamakan, a long way from anything or anyone else.
I'm a physics graduate, an amateur astrophotgrapher, a pilot with an expired license, and I can identify aircraft, satellites, and so-forth - but some stuff I can't explain.
I also saw bona fide ball lightning and St elmo's fire a few years back driving across the Russian steppe, between astrakhan and volgograd - huge electrical storm, but as we were heading towards it, we kept seeing little sparks of bright white light zooming up from the road into the clouds, and as we were coming into the storm, we noticed the barbed wire fences along the road glowing with purplish plasma. Cows in the field were sporting furry plasma pompons on the tips of their horns. Absolutely nuts.
Anyway. I reserve all judgment on the question of LGM, but it'd be foolhardy to say all unexplained phenomena simply don't exist.