We once had the task to quote relevant passages of 'Heart of Darkness' and analyze them, i.e. explain how the author uses certain themes / motives to create athmosphere, or point out irony or whatever. We were especially advised to NOT pick out examples of metaphores or similes alone because they wouldn't be 'deep' enough.
Well a classmate of mine produced some hilarious quotes and passages. One was about fish swimming next to the boat. I think it was something like 'fishes swimming like a [insert some long, straight thing]'. And his comments:
'The [long straight thing] is long and straight, so the fishes must have swum in a very straight line indeed.'
These quotes only happen because average students don't care at all about literature and do the homework the period before it is due, while pretending to 'listen' to chemistry or whatever it is.