If it's any consolation, I did the same this morning. Up at 6, into Bow for 8am to crack on with a one off block of flats clean. First window, section no2 on my extreme went.Bit of a kicker as I snapped no1 two weeks ago
To be fair the section was about 7 months old and had been wearing thin for a while. Snapped just below the clampAnd I was extending the pole over some cars almost horizontally with about 40 ft out, so all that pressure on an already weak section isn't a good idea.