facebust
Checking Facebook at work for a second, only to get an IM from someone who knows you're supposed to be working.
I logged on to Facebook during lunch and got an IM from my boss asking why I was online.
I checked Facebook for a second and my coworker messaged me, 'You're not working.'
I opened Facebook during a meeting and my friend sent me a message, 'You're not even paying attention.'