One for the Blondes

I decided that I needed a few days off and I realized that I ran out of vacation time already. I figured the best way to get the Boss to send me home was to act a little crazy. I figured he'd think I was burning out and give me some time off. I came in to work early the other day and began hanging upside down from the ceiling. Just then one of my co-workers (she's blonde. it'll be important later) came in and asked me what I'm doing.
"Shh," I said, "I'm acting crazy to get a few days off. I'm a light bulb."
A second later the Boss walked by and asked me what I was doing. "I'm a light bulb!" I exclaimed.
"You're going crazy," he said. "Take a few days off." With that, I jumped down and started walking out. My co-worker started following me and the Boss asked where she was going. "I can't work in the dark," she said.