THese are brilliant!!Had plenty of injuries and plenty of cock ups. One of my best was when we had a contract to install a load of stop taps on an estate of flats that for some reason didnt have any for individual properties. Most of the outside mains taps were knackered so we had to freeze a lot of them. Froze up a 35mm pipe left it about 10 minutes or so, cut pipe, put on the fiitings needed, turned around to get spanners and boom... 35mm ice plug shoots 4m accross kitchen, never seen so much water in my life. tried to hold back water with my hands , no chance. 2 sparks run in, and fairplay to them, didnt stand there laughing but one drilled a hole through external wall and started bailing water out the window and the other wrapped a tea towel onto the end of a broom handle and jammed it in the pipe and between us we managed to stem the flow slighty. By this time there were about 5 people involved. Whilst we held the broom in place a big strapping polish lad got the fittings and stop tap assembled and ready to go on the pipe and on the count of 3 we let go of the broom and the polish lad rammed the fittings( there was a lot of polish swearing ) on whilst 2 people tightened it up. Luckily was ground floor flat. there was about 2 inches of water in every room, had to replace all flooring and redecorate some rooms. Everyone was drenched to the bone but we were laughing about it an hour later. Never known sparkys be so helpful!!