Starscream was terrified as he ran. Megatron had become a Predacon, more specifically, a Royal Predacon. Megatron wanted Optimus Prime to be his mate, so Starscream had to go get him or Megatron would kill Skyfire, Starscream’s boyfriend. Quickly, Starscream found Optimus, knocked him out and brought him on the ship before giving the unconscious Prime to Megatron.