[kiliantics]

Didn't the drone disappear to recharge/replace batteries and return multiple times? I thought this meant it must be intentional and not accidental.

Though, the accidental explanation is arguably more ominous/terrifying. It reminds of the episode "Autofac" from the "Electric Dreams" series.

[voltagex_]

Hah, that's the first time I've heard "disappeared/reappeared". It's plausable, but are there multiple witnesses/reliable video?