An allusion to Alice's Adventures in Wonderland (1865) by Charles Lutwidge Dodgson, who is more widely known under his pseudonym Lewis Carroll. At the opening of the book Alice nibbles on a cake, causing her to grow into a giantess. Believe it or not this literary adventure has given rise to the term Alice in Wonderland syndrome, or AIWS, a disorientating neorological condition in which sufferers experience a sense of having grown or shrunk relative to the objects around them. This can be triggered by migraines, brain tumours or, as in Cavendish's case, the ingestion of a psychoactive drug. The clip below is taken from the 1999 film, the 14th to be based on Carroll's Alice adventures. The new one (March 2010) starring Johnny Depp brings the number to 15.