When working on a bike with a full fuel tank and you notice what looks like a rotten seam, don't scratch it with a screwdriver to "see what happens". What happens is fuel starts to run out of the hole. You find yourself unable to stop the flow so you have to quickly try to siphon the fuel out of the tank. You end up with petrol everywhere and a headache. Oh, and a tank with a hole in it[1]. Plus 'cos petrol was around the compressor you also get a bit worried that if you don't get the petrol out of the tank quickly, the compressor may switch in and possibly generate a spark... FX: Makes note- get fire extinguisher for workshop. [1] Not too much of a problem, either use a spare or plug it with 'petrol putty'.