It uses "IIII" instead of "IV".
But it is normal for watches to use "IIII" to represent "4", so it's not funny.
Maybe the guy thinks he's clever.
What? !!
Is it the fact that the sun is behind the building on the first image, but infront of the building on the second pic???
Americans
I'm totally lost now! Are you sure you linked to the right page!?!
I'm sorry what? That's a pretty complex mathematical solution for what appears to be, for most people, a pretty simple funny picture!!!
And I don't get it...my head hurts. I've just spent 10 minutes trying to lean about regex which, up until 15 minutes ago, I'd never heard of in my life! Owww, my poor brain!!!
After long and careful examination, with extensive use of algorithms designed especially for the detection of humour, I can confirm that the "funny" is the phallic resemblance of the hour hand.