The experience wasn't wholly dissimilar to aparating. The feeling of being stretched and pulled through matter and across space. Though, he hadn't been the one in control of the ride, like he usually is when he's aparating, so when they landed he had to take a moment to right his vision.

But once he's oriented, Regulus started to take in their surroundings. He could get out of here with magic, but he wouldn't be able to get back in because he didn't have any idea where this was outside the shed.

And then there was the forest person tied to the chair.

"It's not going to hurt," Regulus said. "Unless he resists in a specific way and I don't think he'll do that." But most notably in the answer isn't a rebuke for the restraints. This isn't the first time he's restrained someone for this exact type of venture.

Regulus stepped up closer, in front of the man. He finally let his wand drop down from where it was hidden up his sleeve to the palm of his hand. He took the stone Karsa had given him out of his pocket with his other hand. These things didn't seem to translate the forest people all too well, but Regulus felt it would be enough to get things started.

"What question do you want me to start with?"