lol If he kept doing that over and over, he was shedding. They eat their skin when they shed. I may be wrong, but I don't think they can swallow without closing their eyes?

A regurge will be VERY obvious. They don't just bring up the food, they bring up their entire stomach. Mine regurged once (apparently she's very lucky as frogs often die after a regurge) but when you see it you immediately know something's very wrong. There are no questions as to what's happening.