Maybe Valerie's playing with my head, but she says she saw someone trying to service the X-ray machine at the airport this way. I have no idea if it's turned on and how long it takes to get a cumulative lethal dose.
@BrucePerens_K6BP I bet there's silly things like stuck trays and stuff where you just need to dislodge them.
@BrucePerens_K6BP My guess would be days. People were using unshielded, real-time Xrays before risks were known, and yes, it killed _few_.