Middle of the North Sea. Due N of Dawnstar, there is a large double island of solid Ice with cliffs around, and nothing else on it. Of course, I didn't KNOW that until I went and explored (The Dev Team can be tricky likeat) and wouldn't you know, on the way back, a Frost Dragon pulled up to a hover, and said "HI THERE!" (And by "hi there," I mean "Fo Kra Diin!")
Yay. Nobody swims fast enough to dodge Frost breath, so I had a choice between drowning, and dying on the surface. I tried to go back, and forth between, nothing doing. I ran out of Potions before I ran into Dry Land, and there was absolutely nothing I could do about it. Rationally, I know it's impossible, but subjectively, it felt like hours, and I shat Ice Spikes. Not IC, they don't have an animation for that, but I needed an excuse to replace my Desk Chair anyway. Got real good at counting exactly how long I could hold my Breath without taking damage, but eventually, I woke up on the coast (Have I ever mentioned Save before trying something crackheadded like this?) as if it never happened.
Nothing ventured, I guess. Don't bother, so not worth it.
[Update] In honor of dredging up that (Probably repressed) memory, my personal Proprietary (Meaning not Shared) Mod now has an item on one of those lone Icebergs. "Psiberz' Frosen Ballast" is an Ancient Nord Helmet (unhorned for streamling) with Waterbreathing, and Resists Frost 50...[/U]