You learn more about someone from one canceled flight with them than from a whole week of normal.

Easy conditions let everybody behave well. What somebody is like when the plan collapses, when they are tired and nothing is their fault and there is nobody worth shouting at, is the part that predicts the rest. Friction is not a test anyone designed; it just produces information that comfort cannot.

Notice the small collapses this week rather than waiting for a big one. The bus that does not come, the group project that falls apart, the shift that goes wrong. Watch who stays decent. Then notice what you do under it, because other people are reading your version too.