Thriller Planning

We have begun planning our thriller opening and have opted for a psychological, political hybrid. This would involve a man (protagonist) who has been experimented on by the government, for reasons that do not become clear in the opening, this information will be conveyed to the audience through the use of flashbacks which will appear frequently throughout. The story follows the protagonist's escape from the facility that was holding him. He begins hallucinating a man chasing him and tries to escape.