When I'm working with home circuits I use indicator screwdriver all the time and I'm touching everyting metal with it at every step of the way.

I'm very rarely surprised with what happens but it still happens occasionally.

For example today I was surprised when RCD tripped when I shorted ground and neutral on a circuit that was disconnected by its own breaker.

I had to think for a brief moment to understand that yeah, it's perfectly reasonable that this happened and no, I'm not in any danger.