This is possibly one of the silliest posts I've read on the MOF topic... and that says a lot.To repeat for the eleventy-thousandth time:A mask on a diver's forehead IS NOT A SIGNAL.The words SIGNAL and SIGN mean two different things. They are not interchangeable.Panicked divers whose masks end up on their forehead DO NOT put them there as some specifically conscious "signal" of distress. NO ONE teaches that panicked divers should somehow remember to place their masks on the forehead in order to alert others that they are in distress.NO ONE says to themselves "OK, I'm in distress... what do I do first? Oh yeah... I need to put my mask on my forehead in order to signal to others that I'm in distress!" A mask on diver's forehead IS NOT a universal or absolute sign of distress. It is neither necessary nor sufficient to make that determination.HOWEVER...Rejecting gear - spitting the reg, ripping the mask off, and YES even shoving it up off the face and onto the forehead - is often an unconscious, involuntary, reflexive reaction to distress. Accordingly, in conjunction with other indicators, a mask on a diver's forehead may be one possible sign of distress