Bell giggles uncontrollably and plants a delighted kiss on Sherlock's forehead.
When Tony comes down the stairs, Bell waves him over, hopping up and down as effectively as she can when suspended in midair.
"Hi! You are floating," he says to Bell and Sherlock; to Matilda, "Hi! You are magic."
"She made us computers! I solicited extras to take apart!" Bell repeats for Tony's benefit. "Eeeeeeeeeeeeeee." Sherlock gets another forehead-kiss.
"We've established that," laughs Bell. "Matilda, how do you tell if we're getting magicked? Does it perchance involve magic?"
Bell decides that the waiting period is best spent having levitationy snuggles with Sherlock. "Was talking engineering with the other one of you educational?" she asks over Sherlock's shoulder to Tony.
"Extremely!" says Tony. "Some of the stuff he's working with is kinda primitive by Capitol standards, but not all of it is."
On close inspection, Bell may notice that Sherlock has a few scratches and bruises that she didn't last time they spoke.
"...What happened to you?" Bell asks, picking up Sherlock's hand an examining a little cut over one of her knuckles.
"Sherlock and I wanted to know which one of us would win in a fight," she says serenely. "The answer is me. Damn close, though."
"Well, I did tell you to have fun, I guess. Do you decide to see who would win a fight between you and sufficiently interesting-looking people in Milliways on a regular basis, or just Sherlocks?"