I purchased some lovely stainless braided fuel injection hoses for my car, while messing about and working on the car, I knocked one of them agaist the battery live (while full of pressurised fuel). It tooks a few seconds to workout why the fuel line was going black in one spot and getting very hot. I changed my pants, removed the battery, waited half hour to check for fire and then went home to purchase a £3 cover from ebay!
