So I have add this bug for a little while. I'm not sure why this is happening.
Basically when the saw collides with a volume, it's supposed to change direction. See events and layout below:
This is working most of the time but sometimes it seems to trigger twice and it goes into the wrong direction.
I have attached a capx to download so you can see what happens. You may need to refresh the page a couple of times because the bug does not always happen.
Please let me know if I'm doing something wrong.