"Appreciate it." Senku was the kind of person not to lash out at others typically, but mostly when he misses something and isn't corrected, and then someone's mad about it later, he finds himself floundering. It was much easier to tell him because he never took it personally.

"Heights." Senku confirmed with a bit of a nod. "He refuses to fly in the balloon but we've travelled in other modes of transportation. I bet he always hated to fly back in the modern world...and yet he did it, since he went to America." He was rambling a little bit.

"Huh, don't think about the modern world that much anymore."