Minecraft wiki entry for Nether_survival, associated text: Pro tip: when the fireball is within the player's reach, aim at the Ghast and punch. As long as the fireball is in your FOV you can hit the ghast. NOTE: If surrounded by multiple ghasts, constantly hitting attack while aiming at a Ghast throws all fireballs in that direction, regardless of which direction they are coming from (they still need to be within reach). Do be careful, however, with bouncing fireballs back at Ghasts on the ground, as the explosion from the fireball can not only damage the vicinity, but provoke zombified piglins as above.