humor neutrality

I tried to crack a joke in my MBA IT class last week, thinking i would find a receptive audience.

"I don't know how much of their business processes this company wants to automate over the internet," a colleague says.
"Yeah," i grin, "After all, it's not a truck!"

silence.
somewhere there are crickets.

"You know guys? The internet is not a truck? It's a series of tubes?"

After a brief silence which signaled the complete and total bombing of my joke, someone continued,
"Okay, so back to the case..."

Come ON people? You WORK in IT!!! How can i be the only nerd in a room full of nerds?

If YOU don't know what's not a truck, see http://www.youtube.com/watch?v=DClkE64nFDY