The view from Drudge right now:
I watched the O'Reilly thing last night, so I know what that refers to. Trump — who's not doing the Fox News debate (have you heard?) — went on O'Reilly's Fox News show only to have a desperate and weird O'Reilly badger and interrupt him for 15 minutes over his already perfectly well understood decision not to do the debate, including some incoherent references to O'Reilly's have purchased a number of vanilla milkshakes for Trump... which did get a smile out of Trump... as if, yes, indeed, he does love his vanilla milkshakes. I'm taking that literally. It's not some code, is it? I know "milkshake" is a slang term, but I'd have to bend my mind to find it relevant.
As for the "fist from Heaven"... who knows? Surprised people aren't saying it's Trump's hair. Everything's Trump now, you know.
The link Drudge gives for the O'Reilly interview only has a minute of video and no "milkshake" in the text. Here's complete video:
ADDED: The milkshakes part begins at 13:39: "Would you do me a favor? Look, you owe me a, 'cause I bought you so many vanilla milkshakes, I bought you so many vanilla milkshakes, you owe me. Would you just consider, I want you to consider, all right, think about it, say, look, I [unintelligible] back, forgive, go forward, answer the questions, look out for the folks, just want you to consider it. You owe me milkshakes. I'll take them off the ledger, if you consider it."
Trump's response is: "Well, even though you and I had an agreement that you wouldn't ask me that, which we did, I will therefore forget that you asked me that... because it's an embarrassing question for you and I don't want to embarrass you."
O'Reilly admits that they had an agreement and he broke it, but he's not going to listen to "any political person" telling him not to ask something. "But," O'Reilly says, "You're absolutely an honest person, that I said 'I'll try not to do it,' but the milkshake thing just overwhelmed me."
Trump's all: "It's true. A lotta milkshakes."
Now, I guess all of today will be consumed with the nonsubject of milkshakes. Hard to add that to the "Trump's a media genius" theory. O'Reilly brought it up and belabored it. Maybe the 2 men are in league with each other. In the end, O'Reilly praises Trump for coming on the show. Nobody else would do the show under these circumstances, he says. And Trump repays the compliment and leverages himself by saying that the O'Reilly show is tougher than doing a debate with Megyn Kelly.