According to witnesses, Arquette was very drunk and talking smack about Bieber -- which is apparently okay to do in a Comedy Central roast but not in a nightclub because the Biebs and a friend physically threw him out. A short while later, Arquette returned and tried to get at Bieber but other guests got in the way and threw him out for good.
According to police, the driver had a few too many, drove up onto the curb and ran over a bunch of plants on Jen's yard. It's not known if she was at her Bel-Air home at the time but her security guard called police and showed them surveillance footage of what happened. The driver was arrested after failing a field sobriety test. It just hasn't been his day, his week, his month, or even his year.