Time Out says
Did you know that one of the most famous scenes in all of horror-movie history was filmed in Phoenixville, Pennsylvania, right outside of Philadelphia? Each year, the Colonial Theatre commemorates The Blob by recreating one of the 1958 film’s most well-known moments: when the crowd runs screaming from the movie theater. That’s just one aspect of the three-day event, which also includes Blob-related contests, special guests, live music, food, costume parades and more. Find the full event schedule here.