One of the things I have been most excited about with the Apple Watch is for use in the car where it means that I largely don't have to pull my phone out of my pocket in order to have access to music controls, messages, etc. However this morning I tried to make a call in the car which worked, except that even though my phone was attached to my stereo and playing music, the Siri request was handled entirely on the watch - it didn't pause the music and it didn't route the call through the stereo but kept it on the watch. This is not at all the behavior I would want or expect. Is there any way around it? Does this also mean that I can't answer an incoming call over the car stereo without pulling out my phone?