User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-4483623-20111212165030/@comment-3005793-20111212212045

its how people played the psp mh games. its a way to hold your hand to have access to both the camera and movement controls at once.

http://monsterhunter.wikia.com/wiki/File:PSP_Claw.jpg