I was pranked when in the Air Force. I was assigned to 552nd AWACS and had been moved from working on the flightline to "I" level (inside shop) to oversee repairs of items removed from the E-3's. My enlistment ended in a few months and I'm getting out - 1983.
Phone rings - Sgt UTA, it's for you.
Me: Sgt UTA
Airman: Sgt, this is Airman X at CBPO (Central Base Processing Office) and we have your reenlistment check and your UNACCOMPANIED orders to Turkey. Unaccompanied means a year or more without the wife.
Me: You have the wrong guy.
Airman: Your SSN is X and your full name is Y?
Me: Correct, but I did not reenlist.
Airman: We have your signature.
Me: (Very unhappy) What room are you in at CBPO?
Airman: Room 1234
Me: Wait there Airman as I am coming to see you. (Slams down phone, goes to get field jacket)
Me: (Getting ready to leave and notices that no one is working.) Get to work now!
Team: April Fool's!
Me: (Looking at the calendar and feeling like a jackass)
One of the NCO's on my team set this up with a buddy. I admitted it was a funny joke and offered to buy the Airman a beer after work. NCO informed me that the Airman was terrified of me and declined the offer.
Me: Why, I'm not going to hurt him, it was funny.
NCO: You've never seen yourself when you are angry. It can be scary.
Moral: Don't take yourself too seriously and THINK before you say something.