ptumbi There’s a video of him talking about it somewhere (probably on Parkinson or the like), but the story goes something like this:
One Christmas Peter Sellers was bought a Rolls Royce by his wife as a gift .
Sellers noticed there was a strange sound coming from the rear of the car when driving over bumps, so he phoned Spike for assistance in tracking down the problem.
He turned up at Spike's late in the night, told him of the problem and his plan ..... Spike was given a torch and a piece of chalk and instructed to get into the boot of the car (still in his pyjamas) and whenever he heard a noise to mark where it was coming from with the chalk.
Sellers proceeded to then drive the car, up and down the kerbs of the pavements, trying to illicit the mystery noise.
The police saw this car "drunkenly" mounting the pavement and swerving all over the road.
They pulled Sellers over, and suspicious of something weird going on, searched the car.
When opening the boot, they were presented with the sight of Spike eerily illuminated by the torch and still clutching the chalk.
"Oh it's you" said one of the policeman, and they left!