Here (click on link below) you might be familiar with the first half of the footage showing Professor Cheng doing the short form. The 2nd half shows him doing Push hands with some of his American students with some nice detail:
Dr Chi Chiang-tao doing Push Hands and Da Lu
httpv://www.youtube.com/watch?v=YBEh1eab0b0&feature=related
Dr Qi pushing hands with John Kells and other students.
Push hands
Dear Tai Chi students please feel free to pop into the pushing hands class on Thursday evening 6.30 to 8.00. Push hands is an excellent way to learn how to soften your body to become more physically and mentally flexible, also it is good fun.