Razor Blade Miracle (Blade Eating Mystery)

Show the spectators a handful of razor blades. You demonstrate how sharp these blades are by cutting a piece of paper.

Now this is what happens: you swallow the razor blades with a piece of thread and show the viewers that your mouth is empty.

Suddenly the thread comes up again and, to your astonishment, all the razor blades you swallowed before are hanging on it.

This feat is for ages 16+. Not dangerous if performed correctly. 

English instructions, 5 blades