23|4|10

A starting has to be made in order for something to happen. When the happening involves more than one person, the volition of each person counts. A surprise test was announced and the formation of regularly spaced rows was requested for that. Three people began to follow the one who made the announcement and request, who was walking towards the till then empty back of the room. I followed the announcer/requester and his first three followers. We formed the earliest portions of the earliest two rows. Then only did others start to form the front portions of our rows and all portions of other rows.