First off, they showed all of the good parts 4 this movie in the previews! NOT FAIR! Every time I recognized a part that I saw in the previews I started to laugh early! Lol! Zach G. made the movie.. Robert Downey Jr. was funny as well, but Zach G. made me laugh so damn hard, my eyes were red and on fire burning..it is amazing @ how the dumbest and simplest things people do in comedy movies can make you laugh hysterically! This movie was funny, but it was not funny as I thought it would be like when I saw "Grown Ups." But all in all-it was good..they had some crude/sexual humor, but it was shocking and yet funny @ the same time! See it! You'll love it!