Office prank with balloons

My co-workers and I decided to fill up one of my co-workers offices who has been out on jury duty for 2 weeks with balloons. We also sent 1 balloon in a box via messenger to his house...reminiscent of the movie Seven. We spent all day inflating these balloons and one co-worker actually got injured as the one she was blowing popped her in the eye. And people say productivity in this nation is declining!