Only Time I Use My Head

An elderly lady and an orthopedic surgeon were travelling in an elevator together. The doors started to shut as the lady was trying to get out of the doors. The surgeon kindly put his head in between the doors so the lady could get out.
“Thank you very much,” said the lady, “but why did you use your head?”
“I used my head because I need my hands for work,” said the surgeon, grinning proudly.

Once Upon A Time

With on one hand