Hmm sorry for necromancing, but i was thinking how funny it would be if they would end up orbital blasting themselves because they really don't understand much of orbital targetting. All that going "WHY DID THIS HAPPEN!?" or "WHY IS MISTER ORBITAL CANNON BLASTING US!?"
I mean, it's not like the Smart Reimu was "that" smart to understand such aspects like how to use coordinates and all that.