http://www.xkcd.com/519/

[Kieren Diment]

On 10/03/2009, at 10:44 AM, Chris Devers wrote:

> On Mar 9, 2009, at 7:27 PM, Simon Wistow <simon at thegestalt.org> wrote:
>
>> "Sorry mate, it's just the way you tell them"
>
> So then he clears his throat and tries another:
>
> "..Pi?"
>
> Long pause.
>
> Then.
>
> Raucous laughter!
>
> "We've never heard that one before!"

If I tell e after that it won't get a laugh.   How about Plank's  
constant?