When I was 14, me and a friend instead of going to school, just stayed on the bus and took the day off. We realised we'd need an excuse to tell our parents / school where we'd been, so we invented a story that a rival lad from another school gave us a poison sandwich.
Elegant and believable, until we got to school next day and the headmaster called us in demanding to know who had poisoned us and threatening to get the police involved.