Yes.

"I'm here to break you out. To free you. I've distracted the guards, but it won't last long. Can you break the bars of your cell?" He's assuming the only reason they have the ability to hold him is because of the guards, and not because of the metal bars or locks. They are entirely mundane to his sight.

He thinks so. Stand back, please.

He does so, and he also covers his ears while he's at it.

It makes a sound, but it isn't loud per se. He makes several slashing motions, and a rectangle appears in the bars, lengths of metal clattering to the floor.

He wants to keep his stuff. The books, mostly, but the clothes are good too. He is sure that it won't slow them down.

There's no time!

Fine. He takes off the bedsheet, puts the books and Kandrad's few changes of clothes in it, and wraps it all up.

Please hold on to it, and then cling onto my back. His thoughts are sure that he's strong enough for it.

Okay. Presumably this is flow magic he isn't familiar with.

He hops onto Kandrad's back, the bag with his stuff pressed between the two of them. He hooks his arms around Kandrad's neck and shoulders while his legs cling onto his stomach.

With a pull of his wrist, he opens the door. With a push from his foot, they rocket through it.