Often both pigs run away and hide when we approach the cage. And occasionally they will ignore us and keep doing what they're doing. But most of the time when they don't run away, they end up watching us carefully. If they were in the middle of snack time or a "meeting," they will pause and watch us. I guess to see if we'll give them food.
And usually if we don't, they'll come beg at the side of the cage to change our minds.