double take

1. N-COUNT If you do a double take when you see or hear something strange or surprising, you hesitate for a moment before reacting to it because you wonder if you really saw or heard it. 不能置信的表情

She looked up, then did a double take when she saw my dress and makeup. 她擡起頭，看見我的衣服和打扮露出不能置信的表情。