My child was playing with a toy she was swinging around and going to break something at my dad's house. I said that toy has wheels so you can either push or pull it. She grabs it and keeping her eye on me swings it around again so I said uh-oh and took the toy away. Of course she was upset so I followed up with a couple that's so sad and she calmed down and moved in for some hugs.
We have a lot more but thought this was a good one. She has become very receptive to uh-oh and knows what it means.