“HEY! Haven’t I Seen You Before?!”
http://dm29.deviantart.com/art/HEY-Haven-t-I-Seen-You-Before-389853887
Humanoid Universe Theory: Humanoid Pinkie Pie mentioned she knew of a girl who looks just like Twilight who lived in the city, which means that Flash Sentry never actually met the Twilight Sparkle of his world, in the movie, at least. So, assuming that Humanoid World’s Twilight Sparkle never attended Canterlot High (since no one recognised our Twilight during her time there), technically she never knew Flash Sentry. Therefore, who’s the creep that just bought her chocolates?