It makes it impossible for the board to say no without having a good reason. They have a fiduciary duty to examine the offer and determine if it is best for shareholders to cash out at this price. And the answer to that is it probably is because Twitter has never had a good path to long term profitability.
So yes, he is having a laugh. I am sure if they agree he will find the money. He just doesn’t care. He sees a poorly run company that is making decisions against his freedom of speech ethos. It is an easy target.