Is it normal to feel threatened by anyone who might be smarter than me?
What I said. Mostly extends to things like academic accomplishment and IQ scores (since I have never been tested myself), but also to other talents, and to a lesser extent whenever someone wants to go into the same line of work as me - I suddenly start viewing them as competition.
I just sort of instantly resent them for being better than me, and wish I could one-up them, although I usually can't.