Hello everyone, this is a cool little exploit that i discovered when i was grinding mobs around the black temple in Shadowmoon Valley.
What you can do here is, Get on a flying mount, fly near the casters that can cast on you while in the air. ( West Wing).
Fly close enough for them to target you and start casting (looks like incinerate) but the second they start casting, fly upwards as fast as you can (Tried this on regular flying mount) and if you get high enough, they will finish casting the spell, you will loose hp, but the firebolt itself is still left on the ground and will follow you around.
However, if you fly too close to the ground, it will fly up and hit you(but you wont take dmg). I havn't tested to see if anyone else can see this, but i think it's Client-side only.
Here's screenies:
Dno if this could be useful for anything lol :P