Another good burn (really, I mean this!) is to chat with them and find out some supporting technology like SQL Server and then ask them questions that they don't know the answer to (but should) and it then discredits anything else stupid they have to say.

>>quietly smile, walk over to them, take your belt off and whip the crap out of them with it.
>
>...and talk to them while your doing it. "How does that feel huh? Can ya feel that?"