Rebirth

A white-collar suburban father Kyle (Fran Kranz) who is surprised at his office by long-lost college buddy Zack (Adam Goldberg). Zack is as wild and crazy as ever, brimming with excitement about the self-actualization program he's just finished called Rebirth. He talks Kyle into going on a weekend-long Rebirth retreat,handing over his keys, wallet, and phone. Thus begins his journey down an bizarre rabbit hole of psychodrama, seduction, and violence. (imdb)