The engine switched off at home ends a journey the body may need longer to finish.

Arriving is not the same as having arrived. The car stops, the door closes, and the body is still carrying the motorway: alertness, noise, the posture of driving, the last roundabout. Expecting yourself to be immediately conversational is asking for a switch that does not exist. Transitions take time even when the map says the trip is over.

Give yourself ten quiet minutes at the end of a journey before anything is required of you. Say so out loud to the people waiting, since they may otherwise read the pause as mood. Extend the same to whoever comes through your door still travelling.