Oddly enough some old hippy friends of mine years ago were into "crystals".. Now i had a badly stiff and painful neck for a while, and one of these characters suggested their famous crystals.. She kind of held the thing over the dodgy neck for a bit, and likely had a quiet word with Isis or something, and that was apparently it..
Anyway I thought no more about it having humoured them, however the next day I was reversing the car out of a narrow alleyway, and suddenly realised I could turn my head round to look thru the car's back window .. And it didn't hurt anymore.!!
The neck was fine and back to normal, WTF..
Now I don't suppose for a moment the "magic" crystals actually cured my stiff neck, it probably would have been fine that day anyway, perhaps it "clicked" back in my sleep or something, but needless to say the hippy mob were delighted..