Work (harmless) pranks thread

I work for a huge goverment and military contractor, so its pretty anal and uptight. Many of the employees have wild sides and like to party when not at work. We fall under FAA guidelines for random drug testing.

I printed on company letter head in a company envelope something about going to get drug tested, along with a company brochure about drug additction. At the bottom of the letter I put just kidding, had you worried. I would leave them on their desk when they were at lunch.