It is easy to pinpoint this strange feeling of anxiety mixed with a definite need to get away from the gift, as well as the store from which it came. Sweaty palms holding the item and a story to match the situation can be almost traumatic bordering on that "fight or flight" feeling.
Later, could also include a feeling of freedom after mission accomplished and you feel a breeze of "all clear" as you stroll back to your vehicle unencumbered & well, "free".
He: Well did the store take it back?
She: Begrudgingly; but now I feel free..... unencumbered; let 'em find some other dork to wear that strange looking thing!