Jock and Angus are close friends. One day Angus wins a bottle of 40 year old Scotch as a door prize in Edinburgh.

Jock suggests that they break open the bottle immediately. Angus says :" Nae, nae. This bottle will be opened only on a very special occasion."

Years pass. Birthdays, anniversaries come and go but Angus doesn't open the bottle.

Finally, Angus is on his death bed. His faithful friend, Jock, is there. Angus raises himself up and clutches Jock's hand: " Promise me that you will open the bottle of 40 year old Scotch and pour it on my grave".

Jock is appalled. He says: " Angus! It's 40 year old Scotch!"

Angus insists that is what he wants. "Don't refuse a dying man his last wish".

Jock is silent for a moment.

Finally, Jock asks: " Angus, will it be alright if I first filter it through my kidneys?"