All the places I ever worked people were always playing pranks on each other. Pranks are fun, everyone laughs, it makes work more enjoyable. Some of the best pranks were very funny. One time we taped a tiny microphone under a toilet seat and connected it to the PA system. Kerplunk, kerplunk, kerplunk comes over the PA system, the person on the toilet hears the sound that matches what is happening in the toilet. Some people yell, some woman scream, everyone laughs. Christmas was always the best time for good pranks we had gift exchange at one job, everyone buys a gift and puts it in the pile with no tag, no name, nothing but you could make it, to a man or to a woman. Everyone takes a random gift and opens it. Most were all pranks, one of the men got a lace night gown everyone laughed and told him how nice he will look in that. LOL.