Whenever someone is trying to explain something to you and have the need to kill some time or piss the explainer off, just keep asking the same question.

"And then you pull on this lever and the trunk releases...."
"But what does it mean?..."
"It means that you can now put things in or take things out of your trunk."
"But what does it mean?..."

Invariably you will eventually get the response, "What do you mean what do you mean."
That's when you know you've won.