Dr Arturo López Ariste, another member of the team, adds: «The overall effect is similar to
the trail of an aeroplane in our skies: the aeroplane travels horizontally at a fixed height, but we see that the trail starts above our heads and ends up on the horizon.
Wisps
of smoke in the video Smoke (2008) seem to reappear as hair in Untitled (2009), as a pool
of urine in Sketch for the Study
of Urine on a Street (2009) or as
aeroplane vapour
trails in Otke Notive (2011).