"My ex is crazy"
When someone says, "my ex is crazy," don't automatically go judging the ex. This could indicate that the person saying this phrase did something pretty bad to make that "crazy" ex very angry.
So, the next time you go on a date, and they tell you "my ex is crazy" (for example, letting the air out of their tires), it probably means they did something shady and might end up doing something like that to you. Tread lightly.