He wants to tell him that he could have ran instead of walking, but he's too confused at the rest of what he hears. Sakura and Sasuke both remember different things from what he himself remembers. Sasuke does mention "the nine-tails," and that gives Naruto the idea to ask Kurama himself.

While Sakura is busy musing and then asking her own question, Naruto is basically blank to his two friends as he carries on his inner conversation. Unfortunately, that's not to much avail either since Kurama remembers it exactly the same way as Naruto.

What the hell was going on?