The thrill is coming to the outdoor observatory at the 1,200-foot tall 30 Hudson Yards.

The upcoming 2.6 million square-foot skyscraper that will be the new home of Time Warner will boast a 1,000-foot high outdoor observation center — and, we’ve learned, an additional “thrill device.”

Jay Cross, president of Related Hudson Yards, which is developing the multibuilding mixed-use West Side project, piqued our curiosity in November when he said the yet-to-be-revealed attraction was available on cruise ships.

“You can choose to pay for it separately and crap your pants,” Cross said during an off-the-cuff speech at the Young Mens’/Womens’ Real Estate luncheon in November. He has not commented on it further, nor would a Related spokeswoman.

We began our search and soon crossed off the leisurely North Star. This is the new glass-enclosed capsule that quietly hovers 303 feet above and around the new Royal Caribbean cruise ship, Quantum of the Seas. The ship just happened to take its maiden voyage from Bayonne, NJ, last month. While the North Star brings riders higher than the Statue of Liberty, frankly, it’s not that scary.

What we’ve learned is that the Hudson Yards’ observation deck — slated to become the tallest outdoor deck in the city — could have a glass walkway that may slant and tilt for even more chills and thrills.

In Chicago, the Willis Tower’s Skydeck and the John Hancock Tower’s 360 Chicago have competing glass walkway experiences. The Willis Tower’s “Ledge” tilts out to provide an even scarier 30-degree-angle view.