During a "Commercials That Never Made It To Air" round, Chris Addison makes a joke about Andy Parsons' baldness ("Do you suffer from dull, lifeless hair? Don't worry, Andy Parsons'll buy it off you.") Andy's response definitely warrants a mention:
Andy: How much did you say you earned for those Direct Line car insurance ads? Well, people deserve to hear about this! [mimes honking a horn, a la the advert]
Then one upped by Hugh Dennis:
Hugh: Dara O'Briain: We work, so he doesn't have to.
In fact, this one has been a Running Gag throughout several episodes.
Then one upped by Dara, who pretends to doze off.
"I'm so old, my pussy is haunted".
And a newscaster repeating it after it sparked outrage.
Hugh completing a stage of the Tour De France in real life. Not as impressive as completing the whole thing, but it still takes some balls to try.
Katherine Ryan recites a major part of the "Prince Ali" song from Aladdin from memory.
Hugh and Russel's argument about Harry Potter. Especially when Russel corrects his comment on Parselmouth.