While it's often more advisable to have a professional handle heavy duty home renovations than to try and tackle them yourself, it's also true that we take a big gamble on the work we're going to get when we do that.
And it's not as if this is a risk-free proposition for them either. Indeed, it's hard to think of a more frustrating experience in the world than spending so much time and effort (not to much mention money) on something only to be stiffed by the person who was supposed to make it worth your while.
But at the same time, it's understandable that people who will end up paying thousands of dollars for what might not even be safe results would want to protect their investment.
Those competing considerations seem to be at the heart of a video capturing one contractor's big blow-up.