Here is a couple of pranks I've pulled on newbies. #1-place saline bag with IV tubing under mattress of sofa,when they sit down their back side gets wet. #2 -About 4 weeks ago ,2 of our new EMTs had come into the day room after doing their morning truck check. I asked them if they had located the fallopian tubes in the truck. I told them they were used for the suction unit. Well anyway they spent the next 20 minutes looking through their assigned truck,and then another 10 minutes looking in the supply room( my chief liked this one, A+ for the weasel).
One of the bathrooms in our station is used by the men and women and the women complain that the men don't put the seat up to pee. I walked into the bathroom and dripped apple juice on the bathroom toilet seat. I could tell it worked,because you could hear one of the women yelling.