A doctor has some trouble with the sink, on a public holiday.
He calls the local plumber, only to be told its his day off …

But I get called out on my days off, too!
says the doctor, somewhat exasperated, and the plumber relents.

The plumber arrives, and glances over the sink, looking preoccupied.
He mumbles something about golf, then hands the doctor a couple of
aspirin and walks out, saying,

Put these in. If it doesnt clear up in 24 hours, come
and see me tomorrow.