Ed Yost own interests turned toward reviving the lost practice of manned hot-air ballooning. This technology had first been invented in France by in the late 18th century by pioneers led by the Montgolfier brothers, but under the Montgolfier system, the balloon's air was heated by a ground fire prior to the balloon being released. The inherent danger of this type of balloon flight led to the system being abandoned when hydrogen and later helium became available. One of Yost's key engineering insights was that a hot-air balloon could be made to carry its own fuel. The invention of relatively light burners
Hot Air Balloon (rock opera) troops on his heels, he swan dives off the cliff into the sea far below. Corrinado swims through the sea, his only chance of survival is to make it to the island; hoping that Morris Mulberry will be waiting with the prototype hot air balloon, the only one left undestroyed by Manilla. As he swims, he gets delirious from pure physical exhaustion. He thinks back to his friend Mulberry and the beginning of Hot Air Balloon Traveling when Mulberry persuaded him to use his invention to start a successful business. Mulberry stands alone on the island with the hot air