The plot is paper thin. Jason Statham's character wakes up to find he's been injected with a drug that will kill him if his adrenaline levels drop. As a result, he goes off on a mad rampage across LA seeking revenge. There really isn't much to it but the fast paced action and juvenile (but more often than not) funny jokes do a good job of covering up the lack of plot. Unfortunately, Crank does run out of steam towards the end and as a result, the final act does drag a little but overall, Crank is a fun way to kill 90 minutes.
It needs more story. more depth. Not just stuff blowing up, gratuitous violence and idiotic sex scenes. However, I did like the concept though.
One of the few positive factors of this movie was its use of very effective music. Jefferson Starship's "Miracles" is an interesting example. As Statham was falling to his "death," the music helped make the scene look more alive.
So basically, this is not only a ridiculous action movie with lots of unrealistic violence, but also with a weak plot that makes it all seem kinda pointless.
Lots of blood and gore and just a little bit funny!
Oh and a really good soundtrack.