this movie truley rocks. so many good twists. Spent like 1 hour after with my mates just sitting in a park talking about all the twists and meanings etc... Deffinately a must see for sure. OMG! I so love the over the rainbow bit...we need to discuss all the bits...but people havent seen it ARGGGHH!! My friend shit herself in the needles bit, I laughed hard as at the bit where jigsaws finger gets snapped...got some weird looks too lol. Seeing the first helps but I would say that you would be able to follow the story line with out seeing the first one. Some bits were predictable though. But over all I LOVED IT!!