His chair was stopped mid-swing and he stood frozen in place, staring intently at Fluttershy with a mixture of fascination and terror.  Celestia flicked back and forth between Fluttershy and the alien.  It took her a moment to realize what exactly was going on.  She remembered Twilight Sparkle mentioning this strange phenomenon in a few of her letters.  They called it The Stare.  Brutal mental dominance was an odd talent for such a shy, innocent young girl; Celestia had never seen a power like it.  This was the first time she witnessed its use first hoof.  