Project H.M. was just the sort of thing one might expect the Internet to latch onto: it was a live streaming video of a frozen human brain being slowly sliced apart. Users who clicked the link on Twitter or Facebook between the 2nd and 4th of December 2009 were immediately confronted with a close-up shot of the brain's interior, which was parchment-colored and framed by a block of ice. In this video, a machine called a microtome slid the brain's halved surface across the screen, shaving off layer after layer of translucently thin tissue. Project H.M. became a small sensation for its 3-day duration. What narrative was this project performing, and what did it intend to teach? Project H.M. was staged by The Brain Observatory, the neuroscience laboratory of Dr. Jacopo Annese at the University of California at San Diego. The brain itself had until recently belonged to Henry Molaison, an anterograde amnesiac who was left unable to form new conscious memories after undergoing a radical brain surgery in 1957. Anonymized under the moniker H.M., Molaison had spent the rest of his life under clinical observation. Studies of him have contributed more to the science of human memory than any single patient in history, and Annese has more than once referred to H.M.'s cognitive organ as "the most famous brain in the world." This author cites Project H.M. as an example of "performative science pedagogy," a mode of teaching and learning that invites interventions on the part of the learner. Her examination of The Brain Observatory outlines the challenges of, and suggests practices that foster, a critical science pedagogy that allows meaningful engagement with the processes of scientific production. (Contains 7 notes.)