This story is peak millennial:  An unemployed 30-year-old woman in Maryland who still lives with her parents is facing second-degree assault charges . . . after she threw a phone at her mom's head for refusing to drive her to a yoga class.

Her name is Holly Anne Albert, and it happened a year-and-a-half ago.  But she just got arrested last month.

According to police, Holly flipped out when her mom refused to drive her to yoga . . . started screaming insults at her . . . then picked up a phone and chucked it at the back of her mom's head, which opened up a large gash.

Her mom used the phone to call 911.  And her shirt and hair were covered in blood when police showed up.

Holly fled the scene, and it's not clear why she wasn't arrested until now.  But she's due back in court later this month.

Her parents are hoping they go easy on her.  They wrote the court a letter that said she still lives with them . . . they don't fear for their safety . . . and she hasn't had any outbursts since. 

(WJLA)

(Here's her mugshot.)