When I started out one of my first jobs came with an on-call pager. It was a puck shaped item that you carried on your belt. When sitting on the toilet it wou

When I started out one of my first jobs came with an on-call pager. It was a puck shaped item that you carried on your belt. When sitting on the toilet it would slide out of its carrier and fall into the basin. Nearly happened twice to me (I caught it). Several others had it fall in. It had to be vigorously cleaned before hand over to the next engineer. That is what is called a "Clean Handover".