Of all the head-shaking and aggrivating news that's come out on The Hobbit, I'm actually taking the "riding a wild pig" as a joke. Since it is from Billy Connolly, who I quite adore as an actor, and he's had some very memorable roles (although, I'm still rather unsure about him cast as Dain).
Anyway, on this one, even with all the other craziness surrounding the films, I'm willing to bet Connolly is referring to all the bacon sarnies he's likely got packed away on set.