Watch Sadisflix. In 2011, Tsai Ming-Liang staged a play, "Only You", for Taiwan's National Theater and Concert Hall. In it, there was a powerfully moving scene where monk Xuanzang walked at an extremely slow pace for half an hour. Lamenting the transient nature of theater, Tsai decided to make a movie out of this slow-walking performance, "No Form", the first of his "Walker Films" series.