That has to be the strangest behavior I've ever seen. If CC or Dovey did something like that I'd probably panic and rush them to the ER Vet! I'm so glad to hear this wasn't a sad ending or something horribly wrong, but I agree that unless it is some kind of mating behavior (which I admit I know nothing about) it definitely looked like distress. Could it have been that maybe something was in the air? Dust, cleaning agents, teflon cookware? The gasping makes a good case for something like that, and could explain why it hasn't continued to happen, if the same irritant isn't in the air right now. CC will make distressed flock calls if I burn food in the oven and it gets smoky, so maybe this was Pickle's way of telling you he smelled or saw something unusual?
Come to think of it, could it have been fear? Once there was a big centipede near CC's cage and she screamed and screamed until I came and found it. Maybe he saw something that freaked him out and this was his response?
I will keep my fingers crossed for you & Pickle that all the tests come back okay!
Oh, and he is GORGEOUS! Wow! What beautiful definition his feathers have!