Beware of reporters doing math -- or stories on technology.

Environmentally minded British motorcycle engineers have produced a zero-emission bike that ticks all the right boxes except one -- it's too quiet.

So quiet in fact that its designers are looking to introduce artificial vroom to keep potential customers happy.

Powered by a high pressure hydrogen fuel cell, the Emissions Neutral Vehicle (ENV) produces the equivalent noise of a personal computer fan belt.

It really stinks when the timing belt on your computer starts to go bad, then you keep on having to reset the clock and tell the computer: no, it's not daylight savings time yet.

Maybe they ought to turn that into a Fark photoshop contest.