It seems he barged in, went through internal chats to look for evidence to scuttle the deal or change the terms.
https://mobile.twitter.com/elonmusk/status/15868858873416458...
Currently the target is Nov 8, but a lot could happen before then.
The entire waiving of due diligence thing is also such a weird talking point. There was no contingency on due diligence, but part of the deal did include access to the information he would need to do it and any incorrect information in public filings should have been enough to get out of the deal.
Tweeting it out, well. I could resist that urge just fine.