Flat was wearing something like a bizarre parachute and falling at a much slower rate than a normal parachute would allow.
Beside him, Hansa and the nuns were descending on identical parachutes. If not for Flat’s concealment spell, it would have looked like a midair show.
“Still, Hansa, it’s a good think we searched the room in advance.”
“Yeah,” Hansa answered one of the nuns, “I can’t believe there were so many parachutes in there. And these aren’t ordinary commercial models; they’re practically Mystic Codes with special magecraft built in. They needed charging with magical energy, though. . . . Did the faction using that workshop plan for the whole building getting take down?”
The parachutes were copies of objects in the real-world suite.
The King of Heroes, who had once said, “I shall at least lend you a parachute,” had put his words into practice and had outfitted the suite with enough for Tine and her subordinates in addition to his furnishings and decorations, but of course Flat and the others had no way of knowing that.

Fate/Strange Fake: Volume 6, Chapter 20 ("Dream Becomes Reality")