Your first sweetheart
A solemn experience
A ludicrous experience
A terrifying experience
A mysterious experience
The circus parade you saw in your boyhood
A servant girl
A dude
An odd character you have known
The old homestead
Your boarding house
A scene suggesting the intense heat of a midsummer day
Night on the river
The rush for the subway car
The traffic policeman
Your boss
Anything listed in the first part of Activity 9 of EXERCISE - Discourse.