Robbie's Favourite Advert

My favourite advert is the one celebrating 25 years of Virgin Atlantic. Robbie loves it too but unfortunately it makes him get all nostalgic about Wimpy food and that gets a bit boring after a while. However that is not his favourite advert, his favourite is the CrossCountry advert when it comes on we all have to be quiet (except Robbie who makes little moans of extacy). It is quite good, but I can't work out why it seems to be snowing in the advert, after all when it snows trains usually grind to a halt!