Both of mine involve my sister.
At the age of eight, she was messing around with my mother's sewing machine when she managed to send the needle straight through her finger and into the bone.
My sister has epilepsy and asthma, and the shock of the pain trigged both a petit mal fit and an asthma attack. Fearing to remove the machine in case the needle broke off in her finger, my parents bundled her, complete with heavy duty steel machine still attached, into the car and drove her at top speed to the nearest hospital. The bewildered but fabulous team in the A&E department found themselves simultaneously treating a child for a fit, a massive asthma attack, and a severe case of sewing-machine-finger.
Fast forward twenty years or so, and my sister is a geneticist, doing research on cancer genes, using mice as a research model. One of the aforementioned rodents decided to strike a blow for all mouse-kind one day, and sank its teeth into her finger, hitting the bone.
The pain made her react instinctively, and she tried to pull the mouse off, but in doing so broke its neck, killing it instantly.
So now she had a mouse embedded firmly in her finger: she didn't dare pull it out, in case the teeth broke off in her bone and caused an infection.
She drove herself to A&E where, on being asked by the triage nurse what the problem was, she wordlessly held up her hand, complete with attached rodent.
The nurse did not bat an eyelid. I suppose working in A&E means nothing surprises you after a while...