What the film companies and directors do alot nowadays is if a film in production is aimed at a particular rating such as pg-13 , a company such as fox will send an action scene to the m.p.a.a and liase with them over whether it's okay as it is or something has to be ommitted or blood digitally removed, even a camera angle-reframed, or profanity edited. The ratings boards in countries such as the u.s. and u.k need a massive over-hauling and updating, these people who rate the films seem to be frozen in time, take a look at terminator 3 in the U.S. it received an R, yet exactly the same cut received a 12a in the uk. Hunger games received a pg-13 in the states, when the bbfc got hold of it they nearly had a stroke and demanded massive edits to the blood and injuries on the weapons and characters. Alot of this leaves people scratching their heads. Don't get me wrong, i'm over the moon prometheus got an R/15, i just hope it's not c.g blood added like fox did with the abomination that was AVP. Ratings need more flexibility, so we have choice and are independant enough to make our own decisions regarding what films to see and our children to watch. Transformers 3 is alot more intense and violent than the avengers, yet both are pg-13/12a. Casino Royale was very violent for a pg-13/12a and so was the dark knight in it's intensity, and nolan has pushed the envelope further with The Dark Knight rises according to Christian Bale. These ratings boards need to move out've the stone age, get their fingers out, so we get to see films in all their uneditied form like they're meant to be. Tom Rothman really surprised me about letting prometheus being an R/15, but after films such as x men 3 and the AVP franchise i'm still very weary of him and his fox execs.