Ads for ELT - Idioms

OK - this is a great way to introduce idioms in class. One idea is to play the clip with the sound off, then see whether students can identify the expressions.
Here are the instructions: ‘The woman in the ad bites into a chocolate bar and moans with pleasure. When a colleague asks her ‘What’s that?’ she says it’s a ‘Reese’s Take 5’. He replies he’s never heard of it and she asks him ‘Where have you been? Under a rock?’ When other colleagues also say they have never heard of the brand, she replies with even more idioms. What are they?’
[NB: I do not own the copyright to this video clip. I have only uploaded it here for educational purposes].