they give it their all. take a look. walls, hills, barbed wire, and mud -- lots of mud. obstacles races have their roots in military training but are now testing people of all different backgrounds. one company, spartan race, host events across the country nearly every weekend. from the hills of northern california to the heart of times square, new york. and it's not only the super fit doing these races. >> i never, ever climbed a ladder before in my entire life. and i did it. >> looks awesome, huh? >> awesome is one way to put it. >> like suicide, too, one or the other -- then you get beat up by the guys at the finish line after all that. that's your reward, bang. >> i don't know how i feel about. that the co-founder is here joining us now. joe -- >> welcome. >> who participates in they look like regular people with lots of muscles. >> yeah. everybody -- you got the weekend warrior, couch potatoes. i had a 77-year-old grandmother out there competing and got the race done. >> if you're a couch potato, how