Working for a firm about 10 years ago, we had the Oxford University contracts and WF Poles weren't the same as they are today (thanks Gardiners)
Anyway I was cleaning one of many Georgian town houses that they own in the City centre, part of the Sciences Dept, I was using one of the very old Tucker poles, brushes were great but the pole a 40 footer had jubilee clips for clamps :
You had to keep a screw driver in your pocket for tightening pole sections each time you opened or closed a section
anyway a section twisted and the aluminium stock smashed a pane of glass and the brush was inside the window shooting water at all the lab technicians
The flow on WFP back then was incredibly high (pre flow controllers) the tail end which in those days was connected to 100 metres of half inch hose pipe was some way from where I was working so by the time I'd made it over to the hosepipe to disconnect I'd given all the lab technicians a good soaking
Good job the Department Bursar was very laid back He just said don't worry about it we'll get it fixed