Julia Roberts never showed this side of Erin Brockovich. The environmental activist, portrayed by Roberts in a 2000 film, was arrested Sunday for allegedly driving a boat while drunk. Brockovich was "struggling" while trying to handle her vessel on a lake near Las Vegas, according to the local game warden. And with a blood-alcohol level just over twice the legal limit of 0.08, it's no wonder why. "This was clearly a big mistake. I know better," Brockovich said in a statement about the incident. She was released from a detention center after posting $1,000 bail.