My co-worker at an old job bought some Walkie-Talkies as part of hurricane season prep, he took one home and left the other to charge in the office.
I was working late, probably faffing about with deployment images, when a woman's voice came over the handset, lousy with static, saying "You must find the keys to achieve freedom", then about half an hour later a fragment of a sentence "Your doom will arrive in one minute".
The next morning I asked my boss and he professed no knowledge of the sentences, he had been home alone and had left the other handset in his car overnight. Throughout the week we got a few more cryptic, garbled, or static heavy messages.
Thoroughly unnerved, a few days later I spotted an ad in the paper for an Escape Room type place that had recently opened several buildings away, the penny finally dropped that it would have been at the extreme range of our walkies and they must be using the same frequency!