The cashier didn’t ruin your day. Don’t make them pay for whoever did.

Frustration goes looking for a target that cannot answer back. The person at the counter is convenient, unrelated and unlikely to retaliate, which is exactly why they receive what belongs to someone else. It relieves almost nothing and adds a small injury to a stranger’s day. You tend to notice about four minutes later.

When you feel it rising, name silently who actually caused it. Take one slow breath before speaking to whoever is nearest. If it comes out anyway, apologize on the spot, since that costs you almost nothing.