When I was young and studying at college, I decided that, on leaving, I wanted to a become a Doctor so I took the entrance exam to go to a Medical School.

One of the questions asked was to rearrange the letters 'PNEIS' into the name of an important human body part which is most useful when erect.
.
.
.
.
Scroll down.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Those who answered 'SPINE' went on to qualify and are very successful Doctors today.
Strangely enough, I didn't.