After successfully putting a scale model TARDIS (with lights!) on top of a building at MIT, the CalTech pranksters behind the caper took their show on the road. In this video, they reveal how they set up the giant structure on top of a UC Berkeley building (it's hard to tell for sure, but I think it's LeConte Hall or maybe Birge?). I hope this encourages more geek pranks at my beloved alma mater.
Thanks for the tip, Stephen Cheifitz!