Drunken driving suspects don't always argue "I wasn't drunk" or "I wasn't driving." Sometimes, they get a little more creative with their DUI defense theory.
Of course, the more creative the theory, the less likely it is to work. But hey, everybody needs a Hail Mary once in a while. And if a DUI is likely to impact your career (as it may for police officers and truck drivers, for example) one of these long-shot defenses might be worth trying.
Of course, defense strategy is something that you should discuss with your attorney, and if you're desperate enough to try one of these, you need an attorney, so consider this helpful information -- not legal advice. Here they are, from plausible to utterly nuts: