Small bug, when thrown ender pearls won't collide with/activate on all entities.
They can collide with Minecarts, Boats, Ender Crystals, and Phantoms; However,

Ender pearls do not activate when they hit Fired Arrows, Snowballs, or Fired Fireworks (all projectiles), but they do activate when they hit ghast fireballs.

It Just doesn't seem right that they activate on a ghast fireball, but not any other projectiles.