I made an awesome TNT cannon that shoots up TNT into the air. This TNT cannon is super compact, only 5x5x4. It only takes 4 dispensers, 8 redstone, 4 redstone repeaters, lots of TNT (up to 6,912 TNT!!!), and a bucket of water. The only bad side is that if you don't have it underwater, it will self-destruct. Feel free to copy me, just keep in mind that the person who made this was Kirtaz99. HAVE FUN!!!
~Kirtaz99

Additional Notes

this takes an average of 10 to 20 seconds to make and have fun! Substitute the water for lava and theres TNT on FIRE