@Betajet: He became quite friendly with the waitress who served him at his usual table.
The wife of one of my friend's in the UK has a Masters in bio-chemistry. Many years ago now (I mean before everyone had computers on their desks) she left work to have kids. When the kids were a bit older she decided to go back to work, but she didn't want a full-time position, so she ended up working for a temp agency.
One of her jobs ended up being at some sort of R&D facility. Apparently the head of the dept to which she was assigned was a real jerk who was convinced of his superiority and who treated people like secetaries as though they were idiots.
He gave her a technical paper to write up. She spotted a subtle error with one of his biochemical formulas. Once she'd finished, she waited until he was chatting with some other managers, then she approached them and handed over the paper and told him "You made a mistake in this formula" and explained the thing in detail using lots of technical jargon then smiled nicely and walked off leaving him with a very strange look on his face :-)