Lightheadedness, blacked-out vision, and severe pain in the neck during my shower??..?

This can sometimes happen if you have been in the shower for too long or you have it on too much of a high temperature. This happens to me sometimes and it takes a while for everything to go back to normal but just make sure that you turn the shower down straight away or get out of the shower and lie down as soon as you can to avoid injury or making anything worse