Remove their own appendix.
When the preparations were complete Rogozov scrubbed and positioned himself. He chose a semi-reclining position, with his right hip slightly elevated and the lower half of the body elevated at an angle of 30°. Then he disinfected and dressed the operating area. He anticipated needing to use his sense of touch to guide him and thus decided to work without gloves.[More of an unbelievable but true story]
The operationThe operation began at 2 am local time. Rogozov first infiltrated the layers of abdominal wall with 20 ml of 0.5% procaine, using several injections. After 15 minutes he made a 10-12 cm incision. The visibility in the depth of the wound was not ideal; sometimes he had to raise his head to obtain a better view or to use the mirror, but for the most part he worked by feel. After 30-40 minutes Rogozov started to take short breaks because of general weakness and vertigo. Finally he removed the severely affected appendix. He applied antibiotics in the peritoneal cavity and closed the wound. The operation itself lasted an hour and 45 minutes.12 Partway through, Gerbovich called in Yuri Vereshchagin to take photographs of the operation.
I took a splinter out once...