The Brink (2007)

Three life-long friends wake after a raucous birthday celebration and boast of their macho exploits. But then one of them visits the bathroom and is shocked to find the body of a close woman friend, who had been out celebrating with them the night before. Suddenly panicking, their friendship begins to disintegrate as the instinct for self-preservation kicks in and they struggle to establish the true nature of events. As the clocks ticks down and their memories and recriminations grow increasing contentious a devastating conclusion lies in store.