That's also because I set continuous collisions:

Code:
action ball_newt()
{
  wait(3);
  gnBall = newton_addentity(me, 75, NEWTON_SPHERE, onforceandtorque);
  NewtonBodySetContinuousCollisionMode(gnBall, 1); // avoid tunnelling
}


btw, are you sure that you need to wait for 3 frames before doing anything, or it is just for safety reasons?