^  This.  So much this.  Don’t watch this if you’re claustrophobic or can’t stand the sight of lots of blood.

SPOILER – The movie he talks about is Watership Down.  If you’ve never seen it, well… it is literally an hour and a half of pure childhood trauma.  I too remember being shocked by the G or U rating.  They had this in the library at my school… kids could check it out whenever they wanted.  I can only assume that the reason it got away with that rating was the prevalent attitude toward animation at that time – that anything animated was just for kids.  But really this movie is PG at the very least – never let a child watch it unless you’re very sure you and they can cope with the nightmares they will have for years afterwards.