I bumped into one of our senior hospital cardiac surgeons in a corridor of a building far from the cardiothoracic venue.
"Sir! What are you doing here?"
He responded, "I came to donate blood. Whenever something goes right, or something good happens in my life, I donate a pint of blood. It's my way of saying thank you to the All-mighty."
"Interesting. How often do you donate?"
"every 3 months on average."
"wow! What a unique way to be thankful".