Well I made one yesterday. Was between jobs, picking up a bacon roll. Phone goes, 'we've got a leaky washing machine valve'.
Nice easy job I think. I'll pop there between jobs. Go down there, and it's the comp fitting that's leaking. The machine is right next to the kitchen sink.
Look under sink, two stop cocks. Client informs me that one does the outside tap. So I turn them both off, turn easy enough. Run the kitchen taps, and it's off. Great I think.
Undo the compression joint and whooooosh! About 3 bar of pressure and I'm getting soaked fast. The client dashes to the front door where theres another stopcock and switches the water off.
Luckilly it's a concrete floor, they'd allready taken the lino up as it was being replaced. I got the wet vac out and cleaned it up. I was soaked. Told them no charge, (how could I charge?!) Felt like a prize TWA*.
Went to next job soaked to the skin, (I didn't have time to go home and change as he had to go out, and by the time I'd cleaned up the water I was running late).
Haven't made a school boy error like that in a long time. Very embarrassing, though in fairness, it was a fairly safe assumption that I'd knocked the water off.
Anyway, they insisted they pay me, and stuffed £40 in my pocket, bless em.
It can happen to anyone...no matter how experienced you get. A wee bit of complacency and you can be a wet plumber. Never good.