it was for non stick pans ie a cake tin .the mum made her little boy a b'day cake when she got it out the oven with her little boy at the table he was so happy his mum had made one as she tipped it out she said quote oh look its stuck im sure this is the advert your thinking of
I remember it being for pizza as well. Two East End gangster types are discussing what to have for tea when said pizza falls out of nowhere onto the table between them. One gangster then utters the phrase while slowly raising his eyes to see where the pizza's come from. I think the actor who played him was this bloke:
Thank you 'littleoldme' it was for pizza and I remember now the two blokes sitting at the table when it dropped down from above. Thank you to everyone else too.