WHY "Duke Caboom"? WHY NOT "Evel Knievel"?
In Toy Story 4, the Duke Caboom stunt biker toy replicates a real-life toy me and my sister had as children, based on Evel Knievel who was a real stunt performer who rode his motorcycle over obstacles. I vividly remember the toy because of the distinctive sound the wind-up accelerator made on the bike launcher: https://en.wikipedia.org/wiki/Evel_Knievel
Why Pixar couldn't have used the actual toy itself, I do not know. All I know is that Duke Caboom as he is now, reminds me of Duke Nukem, and as I recall, that guy didn't do any motorcycle stunts whatsoever.