1. You feel a nigh-uncontrollable urge to shout WAAAAAAGH! at people that are pestering you or angering you.
2. You see someone walking under a red EXIT sign and reach for a weapon.
3. You flip open a nearby notebook to see if there are any new entries.
4. You think of a scenario queue when standing in line to buy something.
5. You wake up your spouse because you're dreaming you're RVRing.
6. You see construction workers working on something and consider joining the public quest.
I'll let any readers out there with ideas fill in some more...