Driving a long a 40 mph dual carriageways 2 nights ago i noticed a object rolling under my car. I suddenly hear a hissing noise and knew i had a flat tyre. I managed to change the wheel and get the space saver on and i had something that looked like a spark plug sticking out of my conti 5. Took it to a local tyre centre and the hole was too big for a puncture repair. I had to foot the cost of a new tyre! turns out the culprit was an electronic cigarette if you hadn't guessed. Obviously some scum bag threw this out of his window but i think it highlights the danger of doing that. They are lethal if they can take out a tyre with nearly full tread!