But seriously, I think the course would still have to be pre-determined. I am however unsure if matter can even penetrate a bubble that's warping space and time around it.
One thing to remember is that there is "a lot" of seemingly empty space in the universe. All matter we know and understand is just 4% of the universe. If one knew what they were doing, odds of running into random objects are very slim I would think.
---------- Post added 2012-09-19 at 11:00 PM ----------