An orthopaedic surgeon, a physician and an anaesthetist are standing in a lift just as the door is closing. A small boy tries to squeeze in but clearly is stuck and about to be crushed by the doors. The physician is paralysed in indecision. The anaesthetist is trying to find the red button to call for assistance. The orthopod sticks his head in the door, thus letting the child squeeze through safely.
The other two look at him- "that was amazing- but why did you use your head?"
The orthopod holds out his hands and looks at the other two incredulously "I cant damage these- I use them to operate!"