Ah, surprisingly I had it last night. Maybe it heard us talking ;-). Lying in bed my right big toe and the 2nd one 'got stabbed'. Usually I just wait till it goes away after about 5 mins. This time I tried 2 things: my usual hack-for-everything, i.e. twist-stretching, didn't help. So I turned on my front and pressed the toes into the mattress, using my other foot for additional pressure. Then it stopped. Can't promise that it'd've stopped anyway tho...