You may have been forgiven for thinking it was the end of the world if you walked through Brentwood on Sunday.
But the zombies invading the high street were helping film the final scenes of new horror film Welcome to Essex.
It sees a small group of survivors trapped in Brentwood trying to escape to Southend and avoid the zombies.
On Sunday more than 500 people travelled from around the country to film a scene where they chase two people down the high street.
The film is due to be released in January.