Stephen Colbert is filming The Late Show in Cleveland this week for the Republican National Convention, and he just gave Donald Trump a good reason to put him on his long list of banned journalists. Colbert, in costume as Caesar Flickerman from The Hunger Games, appears to have sneaked onto the stage without permission to mock the Republican convention and Trump himself. "Look, I'm not supposed to be here," Colbert said, as a security guard pushed him off the stage, "but let's be honest, neither is Donald Trump."

"[Donald Trump] has formed an alliance with Indiana Governor Mike Pence," Colbert said. "It is my honor to hereby launch and begin the 2016 Republican hungry for power games." He then banged a novelty-sized gavel at the lectern. We might get a full clip of the stunt when The Late Show airs, but for now, you can watch a video grabbed from the floor of the convention above.

Colbert has demonstrated plenty of courage in mocking the powerful before, both throughout his time on Comedy Central's The Colbert Report, and even standing beside a sitting president. His 2006 speech at the White House Correspondent's Dinner was a fearless, incisive excoriation of then-President George Bush — the same venue that was used years later to utterly humiliate current GOP nominee Donald Trump.