working double duty? ‘Well, the next thing I knew I was on the ground. I tripped, or somebody pushed me. And while I was down, bam, somebody kicks me in the back of the head. One shot, but it was enough to put me out.’ ‘Lightning Dilip, working double duty.’ ‘Yes, it was. That sergeant motherfucker. Anyway, I woke up in the back of the police jeep with Lightning Dilip’s foot on my chest, and then they threw me in the cells. They wouldn’t let me make a phone call, because of all those –’ I would like to know what does "working double duty" here mean. Thanks.