Even though this gem is making the rounds of the blogosphere it is worth pointing to again here. (This reminds me of my grandmother's answer to my "what do the people do here?" question as we were driving through small Texas towns. Her reply: "They take in each other's laundry." )
Bennett et. al. present a hilarious yet serious abstract showing different brain MRI responses as a dead salmon views pictures of people with different emotional expressions. It is a demonstration of the "multiple comparisons problem" - the fact that if you do a lot of different statistical tests, some of them will, just by chance, give interesting results. A multiple comparisons corrections can be applied, but many fMRI publications still report "uncorrected" results.