Have you also burned yourself on a cup of hot McDonald's coffee?
I sympathize that you injured yourself, but have you ever heard the phrase "Caveat Emptor?"
The question is, is this a dangerous defect in the product or are you, as a presumably intelligent adult, supposed to know how to properly use this product so as to avoid injury?
The world is a dangerous place, full of dangerous things.
That's why it's called survival of the fittest, not survival of the litigators.