@HopelessDemigod
Yeah, radio is magical, and part of why I find it so much fun is that we still don't understand the mysteries of propagation. Yes, we understand exactly how radio "works" (in outer space, in a vacuum) but not the vagaries of terrestrial propagation.

From time to time I've encountered this kind of thing and I love it.

One time I was climbing up I-15 from Los Angeles to Cajon Pass and something started breaking the squelch on my radio. KH-this and KH-that... What? Waitaminute. I pulled over and started working guys on a repeater (2 meters) from LA to Hawaii. Crazy. Tropo-ducting, of course. Signals were quite solid.

Another time I was in Florida late at night, 20 meters was stone dead. So I switched to PSK and listened at 14070. Here was an inaudible signal but my computer could copy it from a guy on Reunion Island. We conversed fine, but no audible signal. The next night we did it again. Hahaha. Low power at both ends. Love it when that happens.