For instance, this new idea that You-Know-Who can kill with a single glance from his eyes. That’s a basilisk, listeners. One simple test: Check whether the thing that’s glaring at you has got legs. If it has, it’s safe to look into its eyes, although if it really is You-Know-Who, that’s still likely to be the last thing you ever do.
~Harry Potter and the Deathly Hallows by: J.K. Rowling