A: You look upset. What’s up?

B: A passenger on the metro train this morning started shouting at me. She said I pushed her! I thought she was really out of order. I couldn’t help it. The train stopped so abruptly.

A: Just forget about it. Don’t let this small incident ruin your day.

Note: If something someone says or does is out of order, it is unpleasant or not suitable and it is likely to upset or offend people. This usage is mainly seen in the United Kingdom on informal occasions. For example: His behavior in the meeting was out of order.