Some of it I'm sure he's right about, that that these things are not the work of the Holy Spirit. The laughter I know isn't. Watchman Nee wrote about that in his book Soul Power and made it quite clear that it comes from the flesh or from something in the soul left over from the powers God originally gavbe to Adam and Eve, but it doesn't come from the Holy Spirit.
Falling over backwards has always seemed to me to be unlikely but I'm not completely sure of that one. However, shaking and quaking have always seemed to me to be genuine manifestations of the Holy Spirit and I've experienced them many times. When you spend a lot of time with the Lord in prayer you may get the shakes and the quakes and I think that's a good sign that it's from God. The Quakers and the Shakers wer eaptly names for that particular experience. As I've spent a lot of time seeking the Lord in the last few months I've had that experience a few times after prolonged periods of prayer. Surely it is something that happens to us as a result of the Holy Spirit's working in us.