Julia Postal said that Oswald had a panicked look on his face "Mrs. POSTAL. Yes; and when the sirens went by he had a panicked look on his face, and he ducked in" as he passed her yet she didn't see him go past her.
"Mr. BALL. And you didn't see him actually enter the theatre then?
Mrs. POSTAL. No, sir.
Mr. BALL. You hadn't seen him go by you?
Mrs. POSTAL. I knew he didn't go by me, because I was facing west, and Johnny, he had come up from east which meant he didn't go back that way. He had come from east going west. "
If she didn't see him go past her, how could she see he had a panicked look on his face?