Araz Saleh, 23, slipped as he was fixing metal panels to the side of a pal's fast-food kiosk, an inquest heard.Friend Salam Kiras tried desperately to stem the flow of blood before rushing to a nearby kebab shop for help.He told in a statement how Araz had one foot on a table and one on an industrial-sized egg mayonnaise container when he lost his balance.Salam added: "His left shoulder hit the wall while the drill was in his hand. Then I saw blood gushing out."Paramedics rushed to the scene in Gloucester Green, Oxford, and took Araz to John Radcliffe Hospital.But the Kurdish-born workman, living in the city's Greater Leys area, died the next day in December 2010.Detective Inspector Suzette Allcorn told the Oxfordshire coroner: "It was an incredibly unusual injury."But there was no evidence of any foul play and the police conclusion was that this was a tragic accident."