The OPCW had send blood samples from the Skripals to the Spiez laboratory in Switzerland which found BZ, a psycho agent 25 times stronger than LSD. The OPCW hid this fact in its reports. An attack with BZ on the Skripals would be consistent with the observed symptoms that bystanders had described. The Skripals were indeed hallucinating and behaved very strangly with Sergei Skipal lifting his arms up to the sky while sitting on a bench. Exposure to BZ would also explain the Skripals` survival.