The Big Bounce by Walter S. Tevis
Inventing a substance that could possibly bounce indefinitely was relatively easy. Stopping it from doing so was not!
Make sure to take the handy dandy "who listens to audio drama..?" survey i have made:
https://www.surveymonkey.com/r/95ZZVJ5?fbclid=IwAR0Fu5aOHvrBim17DAdS-iAmUuUCsIHRcZUIJ3xLlpriH7US5Ysv0Iey4G4