He smiles wide, studying the way Ben holds his hands up, how his fingers are splayed like it'll help him feel the swirling air more intensely. To be honest, Klaus wouldn't be surprised at any new sensations his brother's feeling, specifically after landing a jump like that.

His body must feel like a live-wire right now, each nerve-end electrified with adrenaline and flooded with dopamine-- then here's Klaus just cheering him on, as if it's no big deal, as if— "Yeah, I can't believe you still did it, even when I said not to." The tone is no less happy, though he can't help having been concerned with Ben's well-being after pulling a stunt such as that.

But he can't fret too long, since everything turned out okay and they're both alive on the rooftop, (mostly) uninjured. "...I'm still totally thrilled for you though, holy shit, that was crazy."