I agree, they are great fun! I used to be able to do the hand signal thing but then I realised I was using my index finger rather than my thumb to create the 'phone'. I shall have to practise more!
I love the twinkle in his eyes when he's talking to scary Mary. Lovely! Do you reckon being able to do the hand thing is genetic like how some people can roll their tongues and others can't? Least I can roll my tongue anyway!