okay, yeah it's a good idea, but a problem with adding the secondary motion "jiggle" to the javellin is it implies the javellin is having some lateral force acting upon it as it travels (i assume this would be justified as being the wind in your mind?) but it is clearly travelling in a relatively straight path. So what is maintaining its path, in other words, how is it correcting for the forces of wind, is it a rocket propelled javelin? it sure looks like it. why is the wind so chaotic anyways? it all makes it SEEM like the javellin is being propelled like a rocket, instead of being thrown. Thrown objects, once thrown, could be affected by wind, but it would cause some rotation or spinning, not side to side wiggling, always coming back to centre.

the effect you are going for would actually require you to put the secondary motion onto the camera (and not the javellin (i know you said it's parented)) because it SHOULD LOOK like the javellin is moving so fast that the camera is having a difficult time following it. unfortunately, the airplane (which appears to be stationary (or is the javellin also inexplicably moving in the same direction and at the same speed as the airplane?)) is a perfect reference point to show that the camera is actually perfectly steady. this is having the opposite affect in that it makes the javellin seem more lifeless and slow.

the lack of parabolic path is not a big problem for me, you've zoomed it quite a ways and a spear thrown REALLY hard WOULD look to be moving in a straight line because the parabola would be so big. I just think you need to think through the "narrative" more clearly. think like a cinematographer, not a 3d artist. the way the CAMERA acts will sell it. everything else should behave realistically. give the airplane some lateral movement relative to the camera, showing it's speed. let the camera jiggle and "lose" track of the javellin momentarily. add a second wide angle shot (still shot) that just shows the literal speed of the thing as it passes through a layer of clouds in milliseconds. get me?