We do a lot of practical jokes on L&D. Docs, nurses, techs, the vast majority of us love to pull pranks. And we do them frequently. Birthday folks have to be especially wary (hence the reason they still after 4 years, don't know my DOB). We have a rubber snake that is making its way around. If we have a willing patient, nurses have been known to convince her to place it between her legs and then send the doc in for a cervical check. Lockers have been known to be stuffed full of popcorn.
So last Halloween, another doc had a labelmaker out. He made nametags saying "Boo" for all of the nurses. Bea was working that day, and he had made one for her too. He even offered to affix it to her nametag. She looked at her name badge and read "Boo Bea" from it and turned bright red.
I so wish I had thought of it first!