It was usually a time when the awareness was lowered a great deal, resulting in all kinds of things, like there being a vulnerable or careless moment for them.
They could be followed, and they would not even be aware of it, or someone could approach them and begin talking to them, but they would be too lost in their head to notice anything around them.
Others could just move to do things or to go somewhere, almost like they were on autopilot.
They would follow their usual movement patterns as they would wander almost like a zombie.
If they had little awareness of their surroundings and kept moving around like that, then it was more likely that they would walk into someone or something.
If anything crashed into them or they walked out into something dangerous, then they would not have the right kind of mentality needed to respond to any form of danger that could be coming their way.