Packaging for the "World’s Sharpest Knife," showing a serrated blade cutting a red tomato and marketing text.

I think it must have been about 20 years ago. I was in the supermarket and they had a guy demonstrating these kitchen knives. He sliced a lot of things up quickly, thinly and efficiently.

The knives, from China had lifetime guarantee.
I noticed he had a lot of plasters on his fingers.
There was a deal where you could buy 3 of the larger sized ones very cheaply. I bought 3, a very small paring knife and a fish filleting knife.

Later as I left the store I saw the salesman being handed over by the security guards to some policemen. I think he had been shoplifting.

I’ve still got the knives. Most of them are still quite sharp. I now prefer my heavier cook’s knife for chopping most things. They are good bread knives.