The university where I work used to teach Hard Real Time to electronics students with toy elevators. When (not if) you screw up your elevator smashes into the r

The university where I work used to teach Hard Real Time to electronics students with toy elevators. When (not if) you screw up your elevator smashes into the roof of the elevator tower and self-destructs the toy, reminding you that this is serious business and if you fuck up that badly in real life you'll be lucky if the victims live to sue you...