Why did he throw that?

[Arvedui24]

Hello there, just wondering why on earth did Grima throw a palantir of all things out of the Orthanc window? We all must admit that being a man of some learning at least and i presume at least familiarity with such an item why on earth would he throw it out of a window? There seems to be no sense to it. In addition for convienience such a heavy and obviously valuable item wouldnt seem my ideal choice as a projectile weapon.

Any thoughts at all, i hope this has not been discussed, my search did not uncover anything but i am only human. [img]smilies/rolleyes.gif[/img]

P.S Just an afterthought, would Grima have been ensared like Pippin by the palantir or more accuratley by Sauron's will?

Thanks