Many years ago, I was listening to late night radio, when the host read the local weather report. It contained a reference to "a patchy fog". (get it? Apache?)

The guy stopped in mid-sentence and mumbled something about.."what happens if there's a 'Navaho fog' or a 'Comanche fog'... and he started giggling at his own joke... then completely lost it and began sputtering and choking in an effort to STOP laughing. It must have taken him several minutes to compose himself and get back to whatever he was supposed to do.