Luna probed the phenomenon with her magic. "Hmm. Fascinating."
"I know. Never thought my BBBFF had it in him."
"Judging by his paramours, he has much in—"
Twilight held up a hoof, going pale as she said, "Please don't finish that sentence, Your Highness. This is my brother we're talking about."
Celestia cleared her throat. In her best "chiding teacher" voice, she said, "I don't suppose the two of you would care to share your findings with the rest of us?"
"Indeed," said Rarity. "We trust you can at least explain what happened to Shining Armor?"
"Where he went?" added Cadence.
"An' why he did right after ya cast that paternity spell?" Applejack adjusted her hat like a general's helm.
"Well, the adrenaline in his system managed to sync his fight-or-flight reflexes and cornic lobe in such a way that he managed to reach safety without actually harming any of the mates who were threatening him." Twilight's lecturing smile gave way to another round of repressed retching as her brother and reproduction entered her mind at the same time.
"An' that means?"
"Put simply, fair Applejack, thy addition to his accidental herd was enough to send the young captain fleeing for another universe." Luna nodded at the ripple in spacetime. "A well-executed shift. We may need to partake of him Ourself upon his retrieval."