Not that hard to come up with. Going to a friend’s house instead of going to any variety of scheduled things you usually do (sports, theater, whatever). Similarly, the classic sleepover at approved friend’s place but actually sneaking out to do something else that isn’t at their house. I can think of many more. Maybe you were a by the book kid lol

Ok, yeah as teen if I skipped any schedule things to go to a friend house, my parents wouldn't have batted an eye. Outside of school obligations, the rest was my own choice.