How to draw an impossible box.....

Would you like to impress you mates by drawing something impossible?

No, I don't mean a picture from the 'limited edition' Karma Sutra. What's wrong with you?

And how did you know I've got a limited edition Karma Sutra?

What? I just told you?

Um. It's just for.... it's for...

It's for the pictures of naked women in improbable positions if I'm honest.

Anyway, impossible geometric shapes. How to draw them: Look no further than here:

 

Seriously, go to a bar tonight, sketch that on a napkin and hand it an unsuspecting drunk person -  you'll hear fuses blowing in their brain.

Although stand back because six out of ten times they vomit.

How about a full blown sculpture of it?

No? Not head messing-y enough?

OK, I can top that. Try making the video below full screen, and then stare at it until it tells you to look away:

Now, before it wears off, get some chainsaws and try juggling them.

No, wait, don't! Oh well. Were you very attached to that?

And, to finish off, here's a challenge that will make you fight with yourself*. Going from left to right say out loud the colours, not the words, in the panel below:

The tingly feeling in your head is called cognitive dissonance - it's the left hand side of your brain literally fighting the right hand side for control of your voice.....

*Insert dramatic music here if you want. Maybe something a bit like DER-DER-DAHHHH!?