He should have been listening to Rose's explanation. Either she had a good reason or she had a poor excuse; either way, he didn't hear it. Instead, he brought the full force of his temper to bear on Bones. After all, it wasn't a real screaming match until someone started screaming back. "It needed to be said and you know it! Don't-"

And then Bones said that, and Wash's anger fizzled out immediately and completely, only to be replaced by baffled surprise. For a moment, he was back on the Mother of Invention, trying to parse Florida's latest bizarre turn of phrase-

But Florida never got angry, just even. This was different.

His head tilted slowly to the side, and he stared, still trying to process what he'd just heard. It took him a few very long seconds to manage a high-pitched, "...what?" There wasn't too much more to say; he was still contemplating the very real possibility that Bones had just had a stroke, because how else could he explain that turn of phrase?