Balding man with a beard who has fallen asleep leaning on another man next to him , against the rails of a set of stairs .
There is a very good chance that a tired man naps on his son 's shoulder .
There is almost no chance that a tired man naps on his son 's shoulder .
There is a very good chance that a tired man naps on his son 's shoulder .
A tired man naps on his son 's shoulder .