Knife, Fork Illusion

Okay.I'm easily entertained. And, yes after seeing this video I went straight to the break room here at work and looked for a knife and fork. Once I found them I positioned them in the same way the video did. The illusion does work.   It does look like you have a clear knife when really you  don't.

Was anybody else amused by this here at work? No, not really. OH WELL, NEXT TRICK? lol.