Help Select details from the excerpt that support the theme: With great success, there are obstacles to overcome. Facts that Hayden had read about jellyfish began to zigzag through his mind.
Hayden soon noticed the look of worry on his brother's face.
"I won't be laughing if I get stung during the race tomorrow," Henry said sharply.
"Yeah, I was thinking of that scene, too, when we walked past the boat rental place earlier."