Wei Wuxian hears the warning and comes to a stop. He holds out a hand in front of him trying to figure out if he can feel it before he runs into it. He's noticed that some people seem to be without their hearing so he completely understands her next statement and stays silent until he finds the trolley. Placing both hands on it he tries to guide himself around it then turns around to where the voice is coming from.

"I appreciate the heads up!" Hopefully this one is as adept as reading lips as the others he has encountered.