Ronnie Ortiz-Magro from MTV's Jersey Shore: Family Vacation was arrested early this morning out in Los Angeles at an Airbnb he rented with his girlfriend, according to TMZ. Why am I not shocked?

Just after 2:30am PT, Ronnie allegedly hit Jen Harley (his baby mama), chased her with a knife, which led to the LAPD getting a bunch of 911 calls because she had run out of the house screaming for help. The police responded after Ronnie had locked himself in the house with their baby. They were forced to break down the door, thinking the baby may be in danger, and tased him.

Yikes. I'm not caught up on Jersey Shore: Family Vacation, but, one of the episodes I watched recently showed Ronnie clean, sober, and getting help. I guess things have changed.

TMZ says Jen told police that Ronnie went crazy after doing cocaine. He's been booked with kidnapping.

Just 12 hours earlier, Ronnie and Jen were spotted in LA, holding hands. Wow, that was fast.