[hermitcrab]

Some of the high speed ejections might be due to the approximations used. You can see this with a simple time-stepper when the forces get massive when 2 bodies get very close and that force is then applied for the whole timestep.

[JKCalhoun]

I don't doubt that the math allows for escape velocities in some interactions. But I am wondering if, realistically, tidal forces might instead shred the bodies before forces were adequate for a body to achieve escape velocity.

[hermitcrab]

It might be a fun option if bodies that pass really close can merge together or tear each other apart. The latter might add a lot of complexity though.