i had tried that
Code:

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vec_diff(temp_vec2.x,temp_vec.x,camera.x); // temp_vec2 from camera to target
vec_normalize(temp_vec2.x,1); // lenth of temp_vec2 = 1
NewtonAddBodyImpulse(body_temp, vectorf(temp_vec2.x,temp_vec2.y,temp_vec2.z),
 vectorf(temp_vec.x * QUANTTOMETER, temp_vec.y * QUANTTOMETER, temp_vec.z * QUANTTOMETER) );
 

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but the effect is similar

and the origin of model if exactly in the center(just because its your model crate.mdl )