Watch Free Online HD Moviesjoy. This larger-than-life hologram makes a case for hiding in plain sight. The iridescent figure hovering in this gallery is projected using a technique called Pepper’s Ghost, which dates back to Victorian stagecraft. Despite its resemblance to a digital avatar, Flo depicts a real performer, who dons a wearable sculpture created by Mujinga and sways to an electronic score, also by the artist.