There was a top 10 video they did about exactly that subject!
it was cool. Some were where they made a film look like a comedy when in fact it was a serious drama or ones where they make the film look like a thriller/horror when it is a drama with no thriller/horror aspects at all... I will endeavour to find that link for you, it is an interesting watch!
Until then, this is an awesome youtube channel that make trailers of many films and classic scenes all scene by scene perfectly! Even done some underwater like the Pulp Fiction 'Ezekiel 25:17 one.
ETA: Found them!
