Now that's explains vs Now, that explains

Some examples from the web:

• Wait, now that explains the cage and the chains.
• Now that explains the low EQ.
• Now explain why you chose that size endotracheal tube.
• Now that would explain all the screaming.
• Now explain why I just did that.
• Although this is true, but now explain.
• I put together a detailed operation which I will now explain.
• I will now explain the basis for this court decision.
• I'll now explain what you're asking.
• Now explain to me how you fell for him.
• Ladies and gentlemen, Sir John will now explain to you the situation.
• Good, now explain "the situation".
• I shall now explain the Commission's stance on Parliament's amendments here in second reading.
• (sobbing continues) Marty Weaver will now explain how death comes...
• I will now explain each verse as is necessary.
• Bandai Namco wanted to now explain why this difference in ambience.
• Now in order that today's programme should run with clockwork precision, our Mr Potter has masterminded a plan of campaign which he will now explain in detail.
• Now explain to me how the exuding rock wrapped itself into a coil.
• And nobody is better at this than Lamborghini, as Richard Hammond shall now explain.
• Erm, which is a bit of a problem for BMW every time they replace it, as Richard Hammond shall now explain.

Some examples from the web:

• Now, that explains the vacation days, but everything we learned about Garrett, she was more focused on her career, not babies.
• Retro is unfortunately in style right now, and that explains these tacky rainbow shoes. They're made of polyethylene.
• Wait, now that explains the cage and the chains.
• See, now, we can explain that - Enough.
• You may be here for my mom now, But that doesn't explain the last 14 years.
• You may be here for my mom now, But that doesn't explain the last 14 years.
• As he did during the Axis for Peace 2005 conference, he now explains that international terrorism does not exist and that the September 11 attacks were the result of a set-up.
• That explains why the fires only just started now.
• Now that explains the low EQ.
• That explains the chronitons I am detecting in here now.
• And now I look back on High School and think, well, that explains the Steve McQueen posters.
• Now... that explains how the bodies were picked clean in half a day, but doesn't explain this.
• Ebes, conspiracies to keep them a secret, but right now's the only theory, however insane, that explains any part of is. Sean, I don't know.
• Something that explains what I have, because it is bigger than PTSD, and right now that word is Tivon.
• There is now a large body of literature that explains why, even with rational agents, markets cannot be efficient at the aggregate level, and in particular give rise to speculative bubbles.
• Let's now talk about the present of Aquatronica, which after its participation to the Washington Macna 2015, has published six new videos on youtube that explain and help us use and maximize the new Aquarium Controller.
• Although this interim text is not perfect, in my view it presents a set of advances that explain why I finally voted in favour, advances which the Commission now has responsibility for integrating fully into its future proposals on the subject.
• Well, that explains the headache.
• That explains the extra fingerprints we found.
• Guess that explains Dewey being here.