Practical Joke #1

The set-up for this one is rather elaborate--in fact, you need to wait until you're on your deathbed, with your loved ones surrounding you. Let them go on with the usual stuff for such an occasion: we love you, are you in any pain, we'll always remember you blah, blah, blah... then, when you feel yourself slipping away, lunge at the nearest loved one and grab him or her by the shirt. Cry out, "Avenge me! Avenge me!" Then fall back dead.