Scene: Steve is ranting about how putting throw pillows on sofas for extra padding is stupid. During this rant he says the following:
"This is a sofa. It is designed by clever scientists in such a way as to shield the unprotected user from the risk of skin abrasions, serious head trauma, and of course [Steve throws himself to the floor behind the sofa] Daleks!"
So yeah, I'm still giggling. :)