But then they slid a plastic tube in and the needle it and it was fine . They said I would feel cold going up my arm , but I never did . I remember the doctor telling me I would start seeing the walls move a little , but I was n't .

Question: What may be the reason the doctor said you would start seeing the walls move a little ?
Answer: The medicine in the needle gives you superpowers .The medicine in the needle causes hallucinations .None of the above choices .The medicine causes you to see walls moving closer .