Undercover video of a protester disrupting the Supreme Court has surfaced on YouTube. Cameras are strictly forbidden in the courtroom, and this is likely the first video ever seen of the Supreme Court in session.

The Wall Street Journal reports that the protester caught on camera is Noah Kai Newkirk, an organizer with the group 99Rise. He was arrested and held overnight for making “a harangue or oration” in the Supreme Court building.