I have been working on a new motorway link for 18 months or so now. We are on the final stages and I was working on a large roundabout which is still under construction, I was fitting the flood lights at 20 metres and needed to get a socket set from my van, I came down and to save time I didnt dock my basket as I was going straight back up. I stepped out of my basket and didn't bother to tether my harness fall arrest lanyard to my harness carabina as once again couldn't be bothered as going straight back up. as I stepped out of my bucket my lanyard snagged on my tehering hook in my basket and then released causing me to exit my basket head first. I grabbed my basket door to try to steady myself and this flipped me onto my back, I fell into a 2 metre service trench that had been prepped with its first layer of concrete at its base with rebar sticking out all over the place ready for the second pour. I landed rather awkwardly having fell about 2 metres and a rebar broke my rib and fractured my arm but the worse was a rebar tore my liver. All my own fault and I received a dressing down from my gaffer over it but because of my injuries they just gave me a warning and took some of the blame as the job I was doing shouldnt have gone ahead untill the service trench was finished and back filled. The hospital said I had a lucky escape but I have had worse injuries in the past so it didn't register with me as serious. I am recovering but my fitness is no where near my usual levels.