Brent police officers swooped on a family car believing there was a body in the boot only to discover a novelty fake foot.
Marie Nash, 41, and her son Kieran, were left gobsmacked when a swarm of cops surrounded the people carrier today and yanked out the plastic stump.
In fact the suspect body part was a Halloween prop bought by Ms Nash for her son's fancy dress costume two years ago.
The shocked mother-of-three, of St Francis Lodge, Sudbury Hill, said: "My son had came home early from college and I was in the garden hanging out washing. Suddenly Kieran popped his head out the window and shouted 'mum there are loads of police outside.'
"The first thing I thought was, well I've paid my tax disc, but as I ran to the car I saw two PSCOs, two police cars, a van, and another car zooming around the corner. I couldn't believe it.
"One of the PSCOs was holding the foot while another had a torch inspecting my car. If Jeremy Beadle wasn't dead I would have been waiting for him to pop up from around the corner. It was a joke."
Two PCSOs patrolling the area saw the toy, bought in Asda for £1.50, poking through the back seat from the boot.
Further suspicion arose when they noticed a spare wheel had been left behind the passenger seat leading them to believe it had been put there to make room for the rest of the body.
The housewife said: "It was never meant to cause so much mayhem. God knows what the neighbours must have thought. There was certainly some curtain twitching."
But even though Ms Nash has seen the funny side she thinks the force's response was a waste of police time. She said: "The police were really holding back the laughter and some were absolutely wetting themselves but the officer holding the foot didn't look very happy. He said, 'you do realise we called five units from across London to get here.'
"I was a bit annoyed. There are so many people being attacked and the police do not even come round straight away if your house is burgled. I have to admit the foot does look real but if I was going to put a body in the back of the boot I wouldn't leave the foot sticking out."