Did you know that if you shoot a ghast's fireball it will deflect it and if it hits the ghast its a one shot kill. Also you can teleport to fireballs with ender pearls. You can also teleport to mobs if you want to which can be useful in many cases. For example if your against ghasts or skeletal archers.
Just thought you would want to know :) Idk if anyone else has noticed that, tell me if you have.