Angry thumbs type fast and apologize slow. Put the phone down for ten minutes.

Anger makes typing fast and editing impossible. The message goes out in about eleven seconds, and then you spend days on the repair, which never fully matches the speed of the damage. Nothing in the situation actually requires an immediate reply, though it feels like it does. Ten minutes is usually enough for the sentence to change completely.

Put the phone face down when you feel the heat rise and do something physical. Come back after, and if you still want to send it, send the shorter version.