Yes, the CEO of Rocket Lab actually did that because once in the past he had said he’ll eat his own hat if his company ever moves towards reusable rockets. I don’t know how successful he’ll be with his rockets but he did deliver on the promise to eat his own hat!
You can watch the very cool announcement video of the company’s newest rocket “Neutron” ending with him eating his hat here
I covered this and other interesting developments from the space industry in the second episode of the podcast Exponential Future. The goal of the series is to offer short and structured titbits explaining exponential technology and helping listeners keep up to date with new developments. You can listen to it here