Must be a full moon.

But, hey, those come every month. When’s the last time the Browns upset the Super Bowl champs by 21 points?

Hell, when’s the last time they beat anyone by three TDs?

The answer: November 20, 2005 — Browns 22, Miami 0. Only four Browns starters that day remain on the team. Big Three was the emergency QB.

Now, he’s the re-emergence QB, lighting up the Cleveland sky, and the Giant defense, brighter than Earth’s natural satellite did on this night of its maximal waxing.

And a waxing is just what the Browns gave to the very team that set them back so far in the pre-season.

It wasn’t a perfect performance, but it was perfectly timed. Big-time hook-ups between DA and the Detroit Diva helped give the Browns enough of a lead that the daunting New York ground game become somewhat irrelevant.

Three picks from three young defensive backs, returned for a total of 139 yards, kept a thin D-line off the field and, in the case of Eric Wright’s long fourth-quarter TD, iced what still remained a tenuously-held game.

Those turnovers, and the return of balanced potency to the Browns’ offense, were the stories of this season-saving success.

Not often a team gains 112 yards in a single drive. But that’s what happened to most of the third quarter, as Cleveland overcame five penalties and opened up a 13-point lead at the dawn of the final period.

We saw a flash of the Flash package for Josh Cribbs, the first taste of a true Number Two receiver in Donte Stallworth, 81 yards and a score from the two backup tight ends, and a career-high game for The Ghost — 67 yards on just four touches.

Not once did the Browns turn the ball over, suffer a sack, or even need to send their punter onto the field.

When Jamal Lewis rambled for two first downs to run out the clock, it punctuated the fact that the Browns didn’t just steal some fluke of a win. They finished off the consensus best team in football with a powerful certainty that was a joy to see.

And they did it without Wheelie, without Shaun Smith, without Sean Jones — all of whom should rejoin this now resurgent Browns team soon.

I’ll save the warts for another day. This one was a special win, maybe a pivot point to what might still become a special season. Had they lost, even with spotless execution, this season was sunk. Now, with a memorable Monday night highlight, there’s more than just the shouting.