A cautionary tale
My boss came up to see me today and told me that he had an accident during the weeked. He'd been pressure washing his patio when the lance appeared to block. Like a fool he turned the lance around and looked down the end just as the blockage cleared. He got the full water pressure in his face. The jet hit him about 5mm away from his right eye and literally peeled back the skin as far as his ear and from his hairline down to his chin. The poor guy looks like he's had a car crash and gone though the windscreen. He was so lucky not to loose his eye.
Be careful folks, these things are not toys.