Coughing Dry heaving?

I just walked over to visit Fonzie and Stanley, and Fonzie was in the center of the cage, doing something that looks like dry heaving/a cat that's about to cough up a hairball, but without the noise. It was almost violent with the body jerking, and it confused me because I know guinea pigs cannot throw up? There was no coughing at all, no choking noises like he sometimes gets if he's eaten too fast or choked on some water.

I freaked out for a second, and then went to pet him to see if he was okay (He's usually a bit skittish, if he stood there and let me pet him I would have been worried) But he stopped the heaving- thing immediately and ran away. I fed him a piece of hay and he drank some water, and it hasn't happened since, but I looked it up and the only explanation I could find was "Heaving Hiccups" which sound pretty harmless, just some water going down the wrong way probably?

He's been eating normally, and he was just running around yesterday fine (I haven't let them out for floor time yet today) so other than this, he seems pretty fine..

Should I be worried about him?