You freak you inflated with Frank. Frank was helpless along for the ride. Unlike you, he didn't know that the zentai was you. One minute he was walking, and the next he was a meat puppet. He couldn't figure out how you and he were able to compact yourselves into that tiny box, and why you shipped yourself back home. He just knows Chris is on the floor unconscious.
You sway back and forth, and realize how insubstantial you are now. You're an inflated zentai rubber man, but your mass is now just air. What happened to your body? What happened to Frank? E=mc2 or something like that? Trying to remember your physics mass times the speed of light equals energy? You guess the energy of fusing with Frank, compacting your body, and reinflating it must have consumed your mass somehow? But you really have no idea. You don't know why you cannot move except you have a feeling that it has to do with what Chris shouted before he fainted.
"Stop!" and you stopped. You are stopped until Chris reactivates you.
Just now Chris moans and sits up. He looks at the box and curses, "Bruno. Should've known."
He gets up and punches the muscled zentai in the chest, you sway back and forth.
"Kinda looks like Frank," Chris comments walking around the featureless man shape. "If you were gold, I'd call you Oscar. Hm, I wonder if there's more gold spray paint in the basement?"
No, it's Kyle, it's Frank, you think at him unable to speak.
"Wicked prank though, I have to admit. Open the box and a man five times to big to fit in the box pops out. Wonder, how I can reset it for Kyle? No gas cartridge. Wait there's a card in the box."
A card? You missed that! Or did it only appear after you got in the box? What's going on?
"Drone Slave Unit? Right?" Chris mutters reading the card. Then he looks at you, and says, "Okay, Balloon Boy, go get me a cold beer from the refrigerator, and bring it to me."
Instantly you can move. You pivot and goosestep off to the kitchen.
Frank is terrified, and thinks to himself, Now what?
You retrieve the beer in your rubber hand. It is heavy, and pulls down your inflated arm, but you compensate. You hand Master Chris the beer. "Master"? Seriously, you just called Chris master? What the fuck did Bruno have planned for you? Drone?
"Wicked cool!" Chris said unscrewing the beer top, "I got me my own Baymax inflatable robot like Big Hero 6!"