                         Explosions
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  Dust creates realistic explosions, too."
  That means:"
    -gravity: all particles fall down"
    -small faces will fly wider than larger faces"
    -small faces will rotate faster than larger faces"
  You have to specify the following parameters:"
    -time, good value: 2..30 seconds"
    -gravity constant, good value: -10.0"
    -friction (Stokes), good value: -0.001"
    -speed at t=0, good value: 10..100"
    -maxRot, number of rotations of the largest particle"
  Thats it!");
