“Jumpin’ Jack Flash!”

Aha! There was his ace pilot now! Just as he had instructed, heading inside one of the surrounding buildings. He made the wall invisible to himself and his Black Knights, then just as he had trained into them they all closed their eyes at the very instant they heard Kallen call out her Stand’s name. The wall vanished under Kallen’s assault from inside leaving the military firing blind while they retreated indoors. This battle wasn’t done yet.

-Lulu's Bizarre Rebellion Chapter 23