A keeper closing the pachyderm house at the end of the day had locked the doors at one end of the huge building and was attempting to herd the remaining visitors out.
One man. who had just come in the open door, pushing his elderly grandmother in a wheelchair, asked if he could wheel her down to see the rhinoceros. The keeper explained politely that he really had to get everybody out of the building as soon as possible and that if he let them go down there then everybody else would want to.
To which the man replied, “That’s ok, she doesn’t have that long to live anyway,” and turned to leave. As they left the building both he and his grandmother were laughing at what apparently was some sort of a family joke.