What is that movie called? some with invincible but in not sure just something with a "IN"?

So a guy is coming back from a party he was walking aside of the street in the woods were nxt to him.. he comes along one of the characters named annie and some other teens in the movie and later they got in into a fight and they guy nearly died but the teens thought he was so the put the body in like the things you see on the street on the ground that you can lift up kind of like the sewer but not... So they put the in there and later throught the movie the search is on for him in they search in the woods but couldnt find him so annie comes back in moves the bodie in the dam...To be continued....