I used to wear my father's WWII issue watch to school. In one physics demonstration, the teacher used tweezers to remove a radioactive sample from its protective box and pass a geiger counter over it. It gave a reading. He asked for volunteers and I handed over father's watch for testing. The geiger counter went off-scale. Oops.
No sign of wrist cancer so far, and I'm not planning on dying of it. Cheers.