Telescope zooms in to the night/day terminator on the moon. Check out all the craters with central peaks - formed when a crater gets so big that material collapses back towards the center during the process of impact.
Imagine Sirius Black discovering muggle extreme sports.
-It’s Remus who make the mistake of mentioning sky diving in a conversation, a moment he will regret forever.
-Sirius, of course, just cannot let it lie, and conducts all sorts of research into the more dangerous aspects of muggle entertainment.
-It’s not until the next summer that Remus realizes just how big of a mistake he’s made.
-Sky diving is not exciting enough for Sirius Black. After all, falling from heights isn’t that novel of an activity for an accident prone Quidditch player. No, Sirius has his mind set on motorcycles. Jumping motorcycles.
-There is a brief moment when Remus almost has a hope that James might talk the other boy out of doing something so stupid. (How on earth is Sirius going to operate a motorcycle when he can’t even get a light switch to function half the time?) But, alas, Remus should have known better. If Sirius is going to do something stupid and potentially life threatening, you’d better bet James will be there right along side him.
-Peter, naturally, is even less help, offering excitedly to video tape everything.
-After the first few disastrous attempts, Remus promises himself that he’s not going to be dragged along anymore. Unfortunately, he can never quite tear himself away from the impending disaster which is Sirius and James, and so he finds himself roped into healing them after every misadventure, grumbling all the while.
-Remus is too relieved for words when motorcycle jumping becomes ‘just too boring’.
-That relief is quickly vanished when parkour is mentioned.