Touch of Death Puns

There once was a greedy ore mining magnate who wished that everything he touched would turn into iron. He was careful to always wear gloves except when making huge loads of ore, except for one day when a mosquito landed on his knee. Not thinking, the magnate slapped his leg with his exposed hand. His knee immediately became metallic and the sudden change to his blood pressure caused almost instantaneous death.

Later in the morgue the Coroner noted that it was a classic example of situational iron knee.