When you start assessing the ambient population of locations.
When you haven't had your nails done in a while and feel like it's time to update your @nakeds.
Traditions of elite criminal organizations
Risks of performing surgery in unsanitary places
How to pick pockets
How to evade the police
How to launder money
Average KO times when knocking people out via striking
How to build up a successful rebellion
How to start a gang
How to embezzle money
Effect of cannibalism on health
How to hack secured servers
How to leave a gang
Common make money quick scams
Some of these are generalized just to make the point clear without giving too much away. :-)
1. You have a meeting with your senior VP at work about an issue. You come to an agreement and say, "Aces" to them and hope they don't notice how weird you sound.
2. You refer to work to your spouse as "biz."
3. You see someone in an outfit that doesn't remotely match and think, "Someone just came through the gate."
4. You hope to god no one looks at your search history, because no one one the planet will believe it's for character research.
My girlfriend gets me.