 Sayid sets off his bottle rocket to signal the antenna power up process . Shannon Rutherford ( Maggie Grace ) sets off Boone 's rocket from the beach , as Boone had gone to help rescue Jack , as does Sawyer from his location . Sayid turns on the <unk> , but before he is able to triangulate the signal , an unseen person knocks Sayid unconscious with a stick . 
