My workplace has a fitness center with a bunch of weight equipment set up for circuit training. So I went there with a few of my coworkers, and we started at various places on the circuit...

Thing is, my coworkers are like 200+ pound guys. And thus I sat down at one of the machines where you pull down, without checking what the weight was set at, reached for the handles... and promptly found myself using them as a chin-up bar. Uhm, yeah. There was about 30 pounds more on there than what I weigh.