http://www.collegehumor.com/video:1735367
See, math == free beer.
Caj
That’s nasty! 
djm
Boy’ that is indeed sweeeeeeeet!
But I’d need some other form of payment: I already get free pints when I’m out at the pub, since the only time I go is when I’m playing sessions.
Hmmmm …
Woah that’s blocked by my work. Must be something dodgy, we don’t block anything (except gambling sites, which means I can’t even check my lottery numbers).
It’s on College Humor, so yes, it’s very dodgy. 
I had to check it myself using my own glasses. Neat!
I wonder why it’s so effective. I guess it’s partly because of the taper of the glass, and partly because when we see a cylinder, we intuitively imagine the circumference as maybe twice the width (diameter) when it is in fact a little over three times.
Caj
I think I’m gonna go out for a few pints tonight. 
Oh yes… 
Slan,
D.
My old pappy used to tell me “Son, someday a man is going to come up to you and hold out a brand-new, sealed deck of playing cards, and he will bet you that he can make the jack of clubs jump out of that brand-new, sealed deck of playing cards and piss in your ear. And if you take that bet, son, mark my words, you are going to get an earfull of piss.”