You send the wrong message to the wrong person or spell a word embarrassingly bad over messenger.
According to Facebook's statement, in order to delete an already sent message, "simply tap on the message you want to remove and select the option to 'Remove for Everyone'". You will have to make sure you're running the latest version of the app.
There are a few caveats though - you can only remove a message within 10 minutes of sending it and everyone else in the conversation will see a placeholder notice saying you removed a message. A mere visual change.
Recipients will receive a text alert telling them that something was deleted from the chat, and recipients can still see and read the messages you've "unsent" via that notification. From there, you'll be presented with two options: "Remove For Everyone" or "Remove For You".
Deleting a message is relatively straightforward. Then forever after you look back on the event with that painful shudder of humiliation.
Memory stick found in frozen seal faeces in New Zealand
And researchers would be happy to hand the drive over to the original owner, ideally in exchange for some fresh feces to study. The stick was in good condition - "considering where it had come from" - and the researchers let it dry out for a few weeks.
The three services will still work as standalone apps, but will be merged so that chats and messages can pass between them.
Rumours about this life-saving ability have been circulating for months, but it's finally available in an update released today.
"But as people use these networks to shape society, it's critical we continue making progress on these questions".
Global News tested the "Remove for Everyone" feature on Messenger and was successfully able to delete a message from its chat history.
Not mentioned in the birthday address are the myriad controversies that have swirled around Facebook in recent years, from its failure to protect millions of people's private information to its facilitation of misinformation and "fake news" around the world.