Dayshot: He also makes bats drop TNT and does a couple of more spectacular things. All without mods.
The one responsible is YouTuber IJAMinecraft. He basically added several "new items" to Minecraft, actually altered vanilla items, by writing a 26000-character command block script in about 20 hours. They are:
- The Firework Bow
- The Unstoppable Boots
- Mighty Squid Bombs
- Anvil Bombs
- Anvil-Removing Pigs
- Insta-kill Firecrackers
- Bomber Bats
There's a video showcasing them below. If you want to mess around with them yourself, all you need to do is load up a map in Minecraft 1.8.1 (you can change your game version by editing your profile in the launcher), enable cheats, give yourself a command block, place it and paste in IJAMinecraft's script, found here, and finally activate it with some Redstone.
Dayshot showcases some of the prettiest, funniest game-related screenshots and art that we can find.