This post reminded me of an incident that hapened when my dd was between 4 and 7 months old. My dad asked her to stop playing and sleep. My dd stopped what she was doing and glared at my dad. My sis and I joked about how my dd was mad at my dad. Dad says," no, babies don't get angry." to prove it, he tried to pick my dd up. Dd turned her head away and refused to be held( went limp). It took my dad 10 minutes of "I am sorry" before my dd would look at him and smile. It was hilarious even though my dad felt real bad about upsetting his dear granddaughter.
Even now at 3, she shows her anger not by throwing a tantrum but by giving the offender a stare and leaving the room with," that's it. You have upset me. I am really mad now. I don't want to be in your neighborhood." lol