An ex-colleague
Was visiting a client's site miles away from the office.

"We have problems seeing everything on our computer screen" said the elderly book keeper.

"Not a problem" says our hero and promptly adjusts her screen resolution to fit more on.

Except that the resolution he selected was too much for the old screen to cope with.

Our pillock hero had to drive back to the office, collect another monitor, drive back, reset the screen resolution and finally give the aged bookkeeper a hand getting the wages done as the only payroll PC in the office had been out of commission during his five hour round trip to collect a new monitor.
(Bicycle Repairman "you're also a bit of a wanker", Wed 20 Aug 2008, 16:29, Reply)