The Olympics look tough as hell. Superbly fit and dedicated human beings pushing their bodies to extremes that most of us can't even begin to fathom. Sometimes, though, things don't go as planned, reminding us of the vulnerability of human bodies. Because holy shit, some of these are brutal.

1. Annemiek van Vleuten

In a cycling road race in Rio, the Dutch cyclist skid on a patch of wet road and flipped over her bicycle's handlebars, ending up in intensive care with a concussion and three cracks in her spine. But she's okay now, home in the Netherlands, and already back on her bike.