I understand the design of this question (edit: an perhaps the whole exercise) as making a tradeoff between providing an opportunity for two average persons to

I understand the design of this question (edit: an perhaps the whole exercise) as making a tradeoff between providing an opportunity for two average persons to bond strongly and being appropriate for everybody in favor of the former. The average person's most terrible memory, I would wager, is something easier to share in a way that encourages intimacy, namely losing loved ones, injury and personal failure.