Hi Prank,
I have the photo for you Please excuse the bizarre choice of string, that's all I could find. I also have a video if you'd like to see that, but we're not talking quality production. I was trying to think of how to visually show you how strong the hold is, while walking around the supermarket, so I grabbed what I saw... a 1 kg box of flour. So I think it might be about the surface it's stuck onto - what do you think?
Cheers, Sophie