Hollywood stars take to streets on innovative new bicycles

The video introduces Roscoe Karns, Marsha Hunt, and Buster Crabbe, who are involved in a demonstration. It then explains the mechanics of a machine, focusing on how the spring platform and eccentric rear wheel work together to propel it.

What does the text imply about the relationship between the spring platform and the machine's propulsion?

Discuss the significance of the phrase 'propels the machine' in the context of the text.