Tom and his father looked upward. High in the air, almost over their heads, was an immense balloon. It was of the hot-air variety, such as performers use in which to make ascensions from fair grounds and circuses, and below it dangled a trapeze, upon which could be observed a man, only he looked more like a doll than a human being.
"I shouldn't like to be as high as that," remarked Ned.
"I would," answered Tom as he slowed down the engine the better to watch the balloon. "I'd like to go up in an airship, and I intend to some day."
"I believe he's going to jump!" suddenly exclaimed Ned after a few minutes. "He's going to do something, anyhow."
"Probably come down in a parachute," said Tom. "They generally do that."
"No! No!" cried Ned. "He isn't going to jump. Something has happened! The balloon is on fire! He'll be burned to death!"
Horror stricken, they all gazed aloft. From the mouth of the balloon there shot a tongue of fire, and it was followed by a cloud of black smoke. The big bag was getting smaller and seemed to be descending, while the man on the trapeze was hanging downward by his hands to get as far as possible away from the terrible heat.