Regarding the coffee cup, Alan Watts said the forest creates the bug. So if you find yourself reaching for a cup of coffee, it's because you're conditioned by your environment. Maybe you made the decision, maybe not. Maybe to some degree.
Bill, as Jonathan explained, the "reaching for the coffee cup" was simply an example of actions most people make without conscious thought. If not coffee, then tea, or water, or the alarm clock to turn it off, or the pet the cat. Whatever. The point is that something sparks that action, and it is not conscious thought. We don't think, "I shall pet the cat now," we just get an "urge" (desire) to pet the cat, reach out and do it. Desire sparks intent which fires the action, and can be sustained over long periods of time (i.e. it's not a chain sequence of events). Being aware of that state and being able to summon it at will, and to apply it continuously, is what allows us to do things such as work the 6 directions and "hold" them, even when moving.
I get that. The issue I'm speaking to is, that thing that sparks the desire is the influence of the environment (or some unknown force). Let's say it's a guinea pig. Some people eat them. Some people pet them, some people hate them. Those people likely think they made those decisions, but it's much more likely they didn't.
But here is an important consideration- Go back to the test. Tell your subject, at a moment of your choosing, grab the coffee, pet the Guinea Pig or whatever. They are going to decide when. And they will- after they reach.