Flaws in Lord of the Rings... Yes in the book.

[Hot, crispy nice hobbit]

Hiya fellows! I don't know whether this count as a mistake!

'Don't try!' said the old hobbit, turning around and slapping him on the back. 'Ow!' he cried. 'You are too hard now to slap!'

Remember Bilbo giving Frodo a friendly slap after presenting him the Mithril waistcoat? Well, the waistcoat is too hard to slap, but soft enough not to restrict motion. But that is not all! Remeber Bilbo wearing that coat in the original Battle of the Five Armies?

'Well done! Mr Baggins!' he said, clapping Bilbo on the back. 'There is always more about you than anyone expects!' It was Gandalf.

Gandalf sure had a hand that is harder than Mithril... or do all Istaril have them?