Donkey Punch
(2007)

Lisa, Kim, and Tammi are vacationing in Spain. They meet Bluey, Josh, Sean, and Marcus. The men invite them out to their yacht.

The group takes drugs and discusses the donkey punch before everyone begins pairing off in couples. Bluey convinces Josh to do a donkey punch on Lisa. It breaks her neck, killing her.

The women want to report what happened but the men disagree- especially since the whole thing was videotaped. They throw Lisa's body overboard.

Tammi stabs Bluey and escapes with Kim to a lifeboat. Kim shoots Marcus with a flare, killing him. Josh confronts Bluey to find the tape and learns Tammi took it before killing him. Sean goes to help Tammi, but Kim believes he is coming after her, and kills him with the outboard motor's propellor. A distraught Kim jumps overboard and drowns.

Josh and Tammi escape the yacht as it powers away, but she still has a hold of the mooring rope. On the tender, Josh pulls out a hunting knife and demands the tape. Tammi throws it to the floor and then puts the coiled rope end over Josh's neck. He is pulled overboard and hanged as the yacht powers away.

Tammi fires a flare.

Thanks Emily B!