Someone I know is working on a language-recognition study at Johns Hopkins University, and needed volunteers (a.k.a. human guinea pigs) to participate. This meant being strapped into an MRI machine for about an hour and a half while you listen to pairs of real and made-up words in Russian and English, trying to determine if they are the same or different words. The hardest part? Trying to stay awake near the end! But I have definitive pictorial proof that my brain is in there!