Paladin Shield deathbombing.
Instructions:
Step 1: Create a location where you can have a very long fall (a hellavator should work)
Step 2: Turn on Multiplayer and have someone (your "victim") join your team.
Step 3: Have your victim equip a Paladin's Shield and stand at the bottom of the fall/hellevator. Make sure they don't get hurt and fall below 25% HP, or it won't work.
Step 4: Remove all fall-damage reducing equipment, including Wings or Horseshoes.
Step 5: Throw yourself screaming down the fall/hellevator (yelling Leroy Jenkins is heartily approved upon).
Step 6: Upon splattering on the ground, you will take some inordinate amount of damage, probably 10,000 or so, depending on the fall distance. Your unfortunate cohort, however, will "absorb" 25% of this damage in defense of you, resulting in their body spontaneously exploding in death, taking thousands of damage instantly.
How to make it really fun:
Step 1: Get a really big server, Pedguin size . . . dozens if not a hundred people.
Step 2: Create a large box, going from surface to skylimit, if not larger by digging underground.
Step 3: Either have everyone on one team or assign groups of teams; at the bottom of the box will be 1 person for each team, equipped with a Paladin's Shield.
Step 4: The people at the top of the box have to try and divebomb and splat near the Shield-bearer, close enough to kill them. The Shield-bearer's job is to avoid them and not die. In a team scenario, first team to splat their Shield-bearer wins!