When you open your computer after a night of heavy drinking, and only then remember what sites you visited the night before.
Morning after tabs: oh yeah, THAT rabbit hole!
When both parties see each other is typing in an iMessage, and both are waiting for the other one to send first.
While Beth was typing to Sue on her iPhone, she noticed by the three fluctuating dots that Sue was typing as well. She decided to wait to see what Sue would send first. Little did she know, Sue was doing the same...
Turns out they were in a Three Dot Standoff.