The Unnecessary Explosions Mod adds just what you might think: Unnecessary Explosions!
4 Explosions come with this mod:
-Arrows now explode on impact with blocks and with critical hits on mobs
-Snowballs are nukes now. That's all that needs to be said about that.
-Eggs explode from the moment they leave your hand to the moment they land. (Causing catastrophic chaos.)
-Creepers Explode on death. No matter what.
(As a bonus, snow golems also throw nuke snowballs so you better get out of their way!)

----UPDATED----
This update brings 3 more unnecessary explosions:
-Sheep will explode when you shear them.
-Ender pearls explode on impact.
-ExpOrbs will create a constant explosion (not harmful or damaging just more annoying) until you pick them up!

---UPDATED AGAIN----
This update comes with 6 new explosions!:
-Eating and Drinking will cause explosions on consumption!
-Slimes explode when they bounce!
-Note blocks explode when you change notes!
-Lightning strikes explode on impact!
-Tools explode when they degrade!
-Splashing in water causes explosions!
------UPDATED AGAIN AGAIN-------
5 MORE explosions!
-Chickens explode when they lay eggs.
-Breeding a cow will result in an explosion
-Minecarts explode when you punch them(WILL CRASH GAME IF THERE IS ANOTHER MINECART WITHIN 8 BLOCKS OF IT
-Minecarts explode when you or a mob touches it(WILL CRASH GAME IF THERE IS ANOTHER MINECART WITHIN 4 BLOCKS OF IT
-Dropping items (or pressing 'q') will cause an explosion on the player
-Enderpearls can now be thrown in creative
----------FINAL UPDATE------------------------------------

-Player explodes on death (items might be lost / blown a distance from death point)
-An explosion in the water is created when you catch a fish. (more easily seen if particles are off
-New blocks that explode when you step on it or hit it. (spawns naturally at diamond level and looks just like stone)
-Explosion when you jump on snow. (the flat snow not the actual snow block)

This mod also has a new block. I'm not going to go into detail about said block as it has nothing to do with the actual explosions but it's more of a joke.
You will need ModLoader for this. Deal with it.

I recommend that you use this mod only on creative as your world will probably be destroyed once you find out how fun explosions really are.

Stay tuned to find out what new explosions are added! Same Bat-Profile! Same Bat-Mod!