Natural childbirth - 8 hours of level 8-10 screaming and bleeding, after which you have said baby, then they stab you in the leg with a needle to congratulate you, and then stitch you up with only freeze spray for 'numbing' (it doesn't numb). Then they periodically come every couple of hours (no sleep for you!) by to 'knead' your abdomen to check for any remaining placenta in the most aggressively painful way. Through all this, you get...aspirin.