you had gotten taken by the grabber, along with robin, he was taken before you, you thought her was killed, nope! He had been in a coma and was rushed to the hospital, same with you after you escaped, while you're in your hospital bed connected to a IV a nurse walks in

Nurse: knock knock "excuse me (miss/sir) Robin has woken from his coma and he's yelling for you, would you like to see him?"