Friedkins controversial thriller, Cruising, depicted in graphic detail the subculture of gay S&M leather bars in pre-AIDS New York, into which Al Pacinos straight cop is sent undercover, to search for a serial killer targeting men bearing an uncanny resemblance to the star himself. At the time, the New York gay scene lobbied extensively against the production, fearing a homophobic bias, but in hindsight, the tone - while uncompromising - is entirely non-judgmental. Arguably the most jaw-dropping scene however, comes halfway through the movie when a still undercover Pacino along with his prime suspect is being interrogated by a group of city policemen. Without any warning, this happens:And it is never explained.