What's the craziest thing you've witnessed a coworker do while on the clock?

A couple of years ago, a former coworker brought in her nail kit and gave herself a manicure and pedicure. It was a Saturday and it was slow, but I still couldn't believe it. The craziest part is that she didn't get in trouble for it. Anyway, your turn to share. :)

What's the craziest thing you've witnessed a coworker do while on the clock?
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