Yeah! Bring it on lake!" -Coach Gleeson Hedge

He'd heard about people who ascended too quickly and developed nitrogen bubbles in their blood. Leo wanted to avoid carbonated blood.

Wisdom's daughter walks alone.
That didn't just mean without other people, Annabeth realized. It meant without any special powers.

Never mind," Leo said. "I'm pretty sure pi is, uh, 3.1415 blah blah blah. The number goes on forever, but the sphere has only five rings, so that should be enough, if I'm right."
"And if you're not?" Frank asked.
"Well, then, Leo fall down, go boom. Let's find out!

Delaying death is one of my favorite hobbies

You can keep watch, in case – you know, the lake decides to attack us or something." - Leo Valdez