If you've seen 'The Dark Knight,' chances are you'll immediately recognize the title of 'Why So Serious' by Fab 5. This freaky photo shoot takes on Heath Ledger's portrayal of the Joker, capturing all its creepiness in a series of four images.

Check out 'Why So Serious' by Fab 5 above, and keep clicking for more Joker and Dark Knight features from Trend Hunter's archives. This shoot is sure to give me nightmares...

Implications - Businesses that incorporate popular pop culture personalities or concepts into their product are likely to appeal to a wide audience. Consumers that possess a particular preference for a character or story line will likely invest in those products that are reflective of this selection.