He did a lecture. Not sure if you can still find it on Youtube, because IIRC, he published a paper and then redacted it. From what I can tell it was bits of old fashioned differential geometry and a whole lot of hand waving.
i mean he's not a physicist of any sort so i don't think there's anything amiss about this? the "deeply unserious" part is that people can't (refuse to?) recognize that he's not a physicist.
We live in deeply unserious times.