man in the doctor's waiting room

There was a strange young man in the waiting room
Smiling to himself about who knows what
Then occasionally emitting a wincing sigh at the current condition of his health
He picked his nose once or twice
Wiped his fingers on his paint splattered work trousers
He stood up to find a new magazine from the pile next to us, putting us on edge until he'd returned to his seat
Sitting down, he looked down at what he'd chosen and said,
"Sainsbury's Magazine"
And then he guffawed
Then the doctor called us into her room