Along with BoP and Cloak it's one of those useful get out of jail free cards you can use to partially bypass certain mechanics in PVE. If Blizzard lets you.
Originally Posted by Shangalar
I used Ice Block during Siegecrafter progress last Thursday because I saw a mosquito and had to kill it while it was on the wall near me.
I've been there!
"Hey Cloak of Shadows, mind my Rogue for a few seconds while I scratch an awkward itch".
Originally Posted by Tojara
Look Batman really isn't an accurate source by any means