This was a couple of years ago, but on a colleague's last day of work, I stuck the cat card on the back of her desk. Forgetting that in Case Management you have to call parents of patients, etc. Michelle was on a phone call to a very difficult mother. The mother was asking, "Is that a cat? What kind of place do you work in?" I was notified of this as another colleague asked, "Did you turn Michelle's ringer into a cat?" So I moved it immediately from her desk but didn't want to lose this fantastic prank altogether. I stuck it on the back of the fridge in the break room. About a half hour later, I was called to the break room, and I knew immediately why. I was dying laughing because when I got there, the fridge was pulled away from the wall, and all the crisper drawers were pulled out. Sadly, I ended up throwing the card away because I was pretty sure HR might be getting involved. But the cricket card would be amazing!