Clickjack

He finished the e-mail and paused to reread.  He was disconcerted to see, instead of a polite request to be removed from the course, nothing but “FEAR IS WHAT THE PREY CAN CATCH FEAR IS WHAT THE PREY CAN CATCH FEAR IS WHAT”

He hit control-A and delete almost instinctively.  The page was blank, and he was suddenly unsure what he’d seen.  Control-Z.  Nothing.  He pressed a button experimentally.  “B” floated peacefully on the screen, as expected, black on white.  He started retyping the e-mail.

The letters appeared one by one, not at all matching his busy keystrokes:

“E-H-I-N-D Y-O-U”