I know the problem,
he couldnt pat test his patting stuff while you were using the patting tester to do other stuff, cos that prob the other exam he had and when he heard you needed a tester he thought he would come and be patting you up, and testing your patting, and patting your testers too,
maybe even doing a PA test, only not for sound, for a PAT tester to do,
cos doing a PAT course allows you to PAT test, as well as portable appliance test testing,
does it qualify you to fill in stickers too? :C