Everywhere the hands are in a tai chi form---there is a fighting application.
There are no wind-ups in tai chi. No matter what your hands are doing (or legs) a fighting application is available at that moment.
Here's a glimpse into a fun class we had a few weeks ago, when I walked the class through some of the fighting applications from the second movement in Laojia Yilu -- Buddha's Warrior Attendant Pounds Mortar. Some students have only been doing tai chi for a few months--others have been involved over a year.
Click the play button below to see a few minutes from our class.