Dude, I have some bug reporting.
The warlock 1st lightning spell causes some serious bug.
Step 1: Started the ability
Step 2: Stops the ability
Step 3: Spell continuous to cause flashes, see picture below. At the picture, the Warlock is inside a transport ship.
Step 4: I'd unload the Warlock on the dry land, the glitch continuous on as it still flashes in front of it like hitting it with a Farseer lighting missile but doesn't deal any damage to anyone. (Didn't got the screenshot!)
Step 5: I activated the skill once again and then it cause the game to stop, and then it crash.
Also I was playing with UndeadImmortal when this happen, if you want to know about his experience about this problem, do contact him.