User blog comment:Blood Reaper/Skyrim Dawnguard Trailer/@comment-2252497-20120531171044/@comment-5060344-20120531222551

What are ya'll talking about, the dragon just wants a bath :P

But really that must be a scripted event, I can't see the AI being improved enough for a dragon to traverse lakes or the sea. Also, what about those Skyrim super vampires that attack there prey from beneath frozen lakes. Might be worth consideration, although probably not.