I just found this video on Youtube by chance. It wasn’t being too funny but, after a while, when trying to explain why you shouldn’t talk in a public restroom, it starts with an example:

They strike up a conversation about Linux. [...] So there they are, discussing the advantages of open source development…

That really got me. They story gets really complicated and in the end… well you best watch it yourself. And remember: never ever say a single word within a men’s room