This movie is advertised as a thriller/drama/horror, but in my opinion it's neither of those: for the major part it impressed me as some kind of black comedy. We see two best friends drive through the desert to some non-specified place, then their car breaks down and they get stranded in the soaring heat in middle of nowhere. The stress of this puts a heavy strain on their relation: while waiting and hoping for some passing vehicle to help them, they go from reminiscing about the good and lesser periods in their friendship, to bickering, fighting, and at last even physically attacking each other.
In the beginning this was reasonably entertaining, but gradually it got rather repetitive, even a bit tiresome, and I kept waiting for something exciting to enliven it, like a serial killer passing by, or an attack from cannibalistic hillbillies, or wild animals, or even aliens! But it kept on being just these two angry guys; in fact it felt like watching a play in a theater with just two actors. Both Josh Duhamel and Dan Fogler did absolutely great, but it was the script that was too one-dimensional and superficial to keep my interest going.
Add to this, that these characters acted constantly as stupid as possible: to drive into the desert without any provisions or water to begin with, but also stubbornly for several days and nights stay with their car in stead of start walking; or for various unfathomable reasons wander off from the car into the desert and lying down in the sand, so that the occasional car that drove by couldn't even see them! Anyway, the seemingly reassuring ending and epilogue got an ultimate cynical twist, in fact the only thing that lifted this film to a slightly higher level than just being amusing.