（英语原创）Ballex：巨人国的故事-第二章(2)

Without thinking twice, he headed to the roller coaster, only to find that it was really hard to finish the ride as a wooden ball. However, he remembered that he had brought the most important thing here: a tiny but versatile ball-switcher. Then he changed himself into an iceball. It was known that iceball is fast but hard to control, there was nothing to worry about though, as he could control iceball fluently. So he set out and thundered on the track. Finally, the track was finished without any difficulty and the speed record was broken. 

"How did you do that?" Scott asked. 
"Well," answered Charles, "I think it was the power of iceball. Iceball is fast but almost nobody can control it well." 
"Can you teach me how to do that?" 
"Sure! I'd love to!" 
"Brilliant! Then I want to invite you to my house, you can stay there until whenever you want."