Vibe Cast invites the audience of Llum BCN 2020 to interact with this vertical installation, by the ETSAB-UPC, which casts the presence of the public into vibrant shadows on the public space, via a game of reflections. An emergency staircase serves as a scaffold to hold a reflective membrane – and refractive at the same time –that vibrates with the air and translates the light onto the asphalt of the street, in different directions by means of a singular tessellation, to dazzle the participants and cast their shadows into temporary micro-intervals, at Poblenou's Pallars - Pere IV intersection.