Facebook Messenger has a new feature where you can send your most recently downloaded picture via misclick
No confirmation button. No second click. If you happen to graze the button (That's *right* next to the text box) with your finger, it instantly sends the picture.
I noticed the button mid-conversation and downloaded a picture of a cake to test it with. I was *this* close to sending an innocent bystander a picture of naked Bowser. Stay vigilant out there. #entertainment