I need to compare a doentary with mockumentary for content to a websitete i'm building. any ideas?

i'm a first year Media Production student, and have been tasked with building a website using dream weaver and flash. This am very much capable of, however to build a website you need content and it was suggested by my lecturer to discuss the topic of docu-film vs doentary. I have got vague background research on boh genres of film but i need a specific mockumentary (a fictional film set to look like is fact) to compare directly with a doentary (completely factual film). can anyone help with suggestions of category or films or directors to look at?