I have a couple of pizza boxes under a bed in the spare room. My SO wants me to throw them out, I say in a low voice "you'll thank me when the balloon goes up ..."
Pizza boxes are these: https://en.wikipedia.org/wiki/Pizza_box_form_factor
They're basically saying, when shit hits the fan, they'll be able to rely on these old servers.
Next time ask an LLM.
https://dictionary.cambridge.org/dictionary/english/balloon-...