I recently noticed that the semi hero pack on the evidence table closest to the slime jar during the courtroom scene has the thrower hanging in the opposite position and that the front barrel looks as if it has been broken. The awkward hanging position on the pack would make sense since they were attempting to hide the fact that is was broken for those particular scenes. Similarly that particular pack and thrower have the same kind of damage as the semi hero pack currently on display in the Sony lobby, which now makes me think that it is the same one. Any thoughts?
The pack you're referring to is a foam stunt pack because that wand is definitely a foam cast. The foam packs in the second movie were a lot better built then the ones in the first film; they look to have been pulled from the semi-hero molds, making it more difficult to tell them apart.
They most likely put the foam packs on at that part of the scene because of the pyrotechnics.