A video of Michael Marcavage of the Philadelphia-based evangelical group Repent America frantically attempting to shut down a 4/20 pot-smoking celebration near the city's historic Independence Hall went viral this week, picking up traction on social networking sites such as Reddit.In the video -- shot by Marcarvage on April 20, a significant day for marijuana advocates -- the evangelist who was reportedly on hand to share the "gospel of Jesus Christ" is heard questioning park rangers on why they aren't arresting a large group of attendees who appear to be smoking marijuana, an illegal substance under federal law.One ranger tells him that the gathering has "a permit with the parks" to congregate in the space.