The strangest ctd that I've had happened when I "changed a record" on the phonograph. We were going along at 128x & I was getting thoroughly sick of Charlie & His Orchestra; something about that guy's voice just bugs me sometimes, so I changed the record and SH3 "encountered a problem and needed to close".
I wasn't anywhere near land, ships or planes when it happened. This has never happened since (knock on wood).
Like Hanomag said, ctds are something that we all have to live with...