When my daughter gets sleepy, she gets so sensitive! Make one wrong face or noise and she starts bawling her eyes out like she's scared. Example, this video from halloween:
https://www.youtube.com/watch?v=2bFrzAP_dL0&feature=youtu.be
She loves to be chased and make "RAHHH" noises during the day, but god help me if I frown after 7pm.
Re: Sensitive baby