I've recently noticed that touching the metal interior of my dishwasher gives me a slight tingling. I put that (stupidly) to static electricity.
For "fun" I then decided to touch a finger on the metal interior and another finger on my sink. Felt an AC voltage running through my body. The current wasn't painful, but it was uncomfortable and made my fingers twitch slightly.
In the UK, all metal appliances must be earthed (grounded for those across the pond). Touching other areas of the metal chassis revealed that these are not providing an electric current.
What I am most concerned about is that my fuse box (circuit breaker/RCD box) is not tripping. Surely it should detect that some current is flowing out of the electric socket and not returning, right?