Balloons

Two hot-air balloons were attached to the hull of a caravel-type ship, typical of those used by seafaring explorers of the fifteenth to nineteenth centuries, and Rock and dozens of others boarded the craft in a vast city park late in the evening of some sort of summertime celebration.

All went well as they skimmed past trees on the edge of the park, no more than ten to fifteen feet above the crowd and carnival grounds, but Rock gradually began to feel something go amiss. The ship at first brushed the trees and then began to drift randomly across the park, an apparent loss of control adequate to somewhat panic him.