How do i make my nose bleed?

i have a very good reason and i know that it leaves me open to infection and all of the health risks and whatever. just tell me how. and no stupid answers like "get someone to punch you" or "run into a wall" or "get a biker angry". dont tell me why i shouldnt do it. just tell me how. give me several options if possible if not whatever just give me a good way to get my nose to bleed. oh and dont tell me to pick my nose.... thats gross... and dont tell me how to fake one either... i want my nose to REALLY bleed.