While first-time documentarian Kate Shenton clearly has the best interests of her subjects at heart, this documentary into the underground world of human suspension shows plenty of piercings, torn flesh and large hooks penetrating soft tissue. A number of characters on-screen are seen passing out at various moments, and I was certainly teetering on the edge of my own tolerance threshold on more than one occasion. While the film, which clocks in at barely over an hour, could have used a stronger narrative through-line, it certainly succeeds it getting up close and personal with a freakishly fascinating subculture about which I knew precious little indeed.