This is a movie of a slice through a three dimensional simulation of a
plane wave packet being scattered through a double black hole
system. The boundary conditions are periodic, so there is a bit of
mess that goes out of one wall and back in through another, but for
what it's worth <a href="chaos.1.mpg"> here </a> it is.
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Notice the phase waves as the wave packet descends into the potential
well of the holes.