When you leave a meeting that's been going on for 3 hours, the following may happen:

• You arrive late and everyone gives you the "we've been waiting for you" stare.
• The meeting is cancelled and everyone is like "we were just about to get started" but really they were just getting started on their email.
• You leave without saying goodbye and everyone is left wondering if you're okay, but really you're just okay with being out of there.