Is there support for user controlled entities? By this, I mean entities that the user can tell to move around resulting in them pushing other dynamic entities, but they are unaffected as though they have innfinite mass. I know PhysX calls these kinematic actors and, I think, Havok calls them keyframed actors. I have no idea if this is an advanced feature, though.
The reason that I ask, is that I was trying to create a moving platform earlier without much success. I tried moving a static entity, but that was unstable at best

. I considered applying corrective forces to a dynamic entity, but I think it would end up being twitchy.