Clever experiment setup from Cody.

Now I know how to make a super sensitive scale with nothing but passive mechanical elements and a magnet, thanks.
In the Cody's experiment, I would have also aimed at the Al foil through the glass bottle while missing the reflecting/absorbing target, and also made yet another measurement with the mirror tilted 45 degree, in order to check if the point where the laser first hits the glass is heaving any influence or not.
Don't know about the xofunkox's experiment, but he is certainly aware about the possible influence of air molecules. All his videos are without any further explanations and very short, with only 1-2 minutes filming various physics experiments and apparatus, so no surprise that there is no effort to convince others that the experiment was conducted properly.
About the foil acceleration seen in xofunkox's experiment, seems plausible when compared with Cody's experiment, since Cody's instrument was heaving a huge mass to move, when compared with just a thin foil under a high vacuum bell.