Their neighbors wife undressing... through the bedroom window... from the tree ... while playing 'The Stripper" on your phone ... at full volume ... while her husband is standing below you ... holding pruning shears.
You know, when you see someone welding, There is a very bright light at the welding point. The Welder wears special protection for his eyes. But we, passing by the welder, should never look at that bright light, because it can burn a hole in your eyes. Especially with our kids teach them not to look/stare at that light.
When scuba diving around the beaches you shouldn't be looking up staring at ladies swimming in their string bikinis because you might forget about your air supply and have to swim some distance trying to keep head above water with all that heavy gear.
Yessss! Good eye, Slartibartfast! The original from 1960. I remember I was about the same age as these children when I first stayed up late at night to sneak down to the TV when I knew it was going to be shown. The rest of the family was asleep. I was terrified! And I loved every minute. The movie still holds up very well for me as an adult. :)