Seeing stars.

To have slight vision problems after falling down or having been hit in the head. Represented in cartoons as stars or songbirds circling the victim's head.

From tinsel, the chinsy gold and silver strings used to decorate during the holidays—The sensation is rather like having threads of tinsel waved just outside your field of vision.

When you eat dirt for the first time and leave your family to build a shack in the woods