This was the hilarious reaction when a man in central Germany was dumbfounded after his Grandmother's knife glided through a piece of paper ahead of him even sharpening it.

The footage was filmed last year (January 30) but has since resurfaced online and garnered significant attention.

The filmer explained: "I wanted to sharpen my grandmother's old knife to see the difference, I wanted to shoot a before and after video.

"I knew it was a good knife, but I didn't expect it to be so sharp!

"The surprise you see on my face.

"Old quality proves itself, I guess.

"In the end I didn't sharpen it at all."

I wanted to sharpen my grandmother's old knife. To see the difference, I wanted to shoot a before and after video. I knew it was a good knife, but I didn't expect it to be so sharp! The surprise you see on my face. Old quality proves itself, I guess. In the end I didn't sharpen it at all.

Its me in the video. I shot it in January 2018. But it went now viral at Reddit and has got about 80 thousand upvotes.