reasearch - Zombieland Trailor

I found that film tailors where good to look at as they usually have a lot of fast content packed in to them, but this does depend on the film some obviously do not have this. looking at the trailer for Zombieland there was a bit that i thought worked well.
From 00:32 seconds to 00:55 there are fast cuts. also to speed up a scene they had three fast cuts to speed things up. this can be seen at 00:40. i really like this effect, it works really well as its a speeded up clip that then jumps to a slow motion bit, then another slower bit.