When firefighters are battling flames on a roof, sometimes their entire bodyweight rests on the head of an axe. And when things go wrong, accidents can be deadly.
That's part of what pushed 47-year-old Boston firefighter Rob Duffy to create the Quick Step Anchor, a mobile safety platform for firefighters operating on steep roofs, which he demonstrates in the above video.
"About 14 years ago, a friend of mine fell off a roof," Duffy told investors on the most recent episode of CNBC's reality pitch show "West Texas Investors Club." "We were at a fire, and he sustained some pretty serious injuries. He was in the hospital for a while."