our piggies always get grumpy with us when we give them a bath or cut their nails, its usually something that is forgiven with special treat of veggies and hug and in the morning they have forgotten and we are back in their good books! Give him a hug and a carrot and he will forget!
This actually reminds me of the time when I was grooming one of my boys, I lifted them in such a way that I can see his belly, while he was standing on my tummy. His eyes just became so big, wide open. The kind of eyes you get when you are shocked. I felt terrible at that time because he must be thinking like, "what are you doing!?" But its all for his own good. Tangle free, smooth fur.. So I am guessing your piggy will be ok in no time.
He'll be ok! He's just a little scared because he remembers that situation. Don't worry though, because it was for the safety of your piggie. He will get over it! The first time I gave my two piggies a bath, they were afraid of me for a day and then they got over it.