Am I the only one who thinks Gandalf's 'outbursts' are funny? or do I have a twisted sense of humour?
And they are indeed mostly directed at Pippin, the Tom fool of the fellowship.
Like 'knock on the doors with your head, Peregrin Took!' "if you ever feel an itch (...) tell me, such things can be cured. But please don't ever put a stone under my ribs" and quotes such as these (I know they're inexact, but - "I don't have the books with me".
