Scotty was willing to put up with a lot of things. He was willing to put up with being talked back to. He was willing to try reasoning with a kid who didn't seem to know the meaning of the word logic. (And Mister Spock complained about humans lacking logic. Humans were bastions of logic, compared to this demon child.) Muttering a string of rather interesting and rather incomprehensible curses - incomprehensible to anyone who couldn't decipher a thick Scottish brogue, that was - he surreptitiously rubbed at his shin, wondering just how quickly it would get around the Enterprise if he flipped the kid off right back.
Instead, he turned the Serious Voice up a notch and ordered tightly, "Get. Down."