aa777888 - if you are going to try the overwater experience, make sure you have someone with you as a safety pilot. If you really want to mess with your mind, find a sandy beach with breaking waves and the tide fully out and do your turns over the shoreline - your constantly changing visual cues (even from under the hood) will make it rather challenging.
They say a peek is worth a thousand scans - but only if what you see when you peek is useful (like the horizon).