question:  Which of these is the best description of why the narrator strikes the spaceship?
context: A one-time Air Force officer, he has turned to fantasy in his lighter moments, to bring us such brightly sparkling little gems as this. But its small, mischievous pilots had a rendezvous with destiny—on Earth. It was in a park near the nuclear propulsion center—a cool, green spot, with the leaves all telling each other to hush, be quiet, and the soft breeze stirring them up again. You may call it gas, if you wish, for we treated it like gas at the center for convenience—as it came from the rocket tubes in our engine. Without this coefficient to give us control, we would have lacked a workable equation when we set about putting the first moon rocket around those extraordinary engines of ours, which were still in the undeveloped blueprint stage. But when you actually put things together, contractions or expansions in the gas, surface roughness and other factors make the velocity a bit smaller. At the terrible discharge speed of nuclear explosion—which is what the drive amounts to despite the fact that it is simply water in which nuclear salts have been previously dissolved—this small factor makes quite a difference. I had to figure everything into it—diameter of the nozzle, sharpness of the edge, the velocity of approach to the point of discharge, atomic weight and structure— Oh, there is so much of this that if you're not a nuclear engineer yourself it's certain to weary you. Perhaps you had better take my word for it that without this equation—correctly stated, mind you—mankind would be well advised not to make a first trip to the moon. I had seen them first as a boy of eight, and then, very briefly again, on my tenth birthday. Of course it was a spaceship, or a miniature replica of one. So I stepped back to the tiny spaceship, and this time I struck it a resounding blow with my fist.
output:  He wants to show he means business and call to their attention
options:  He is convinced there's nothing there and his hand will pass right through  He wants to test what it's made out of to see if it would make a good model for his own project  He wants to show he means business and call to their attention  He is upset that the people ran away and wants to harm something they care about