An 'Oops' Moment

Telling the IT support person that you are able to tunnel through the corporate firewall because he has opened port 22 for your machine's IP address, hearing that the port has not yet been opened, scratching your head in puzzlement, only to realise a second later that the tunnelling is possible because you were sneaky enough to install corkscrew in Cygwin, and keeping your fingers crossed that he doesn't probe further, and hanging up at the earliest chance you get...