Students at the University of London are getting a free crash course in Bollywood, courtesy the shoot of 'Judwaa 2' on their campus. Actors Varun Dhawan and Taapsee Pannu are shooting for the reprised version of 'Oonchi Hai Building' track from the original 1997 Salman Khan-Karisma Kapoor starrer. The new song is being choreographed by Bosco. Unit hands say students drop in often to groove with the stars on set.