#showtooltip Blizzard
/cast [@cursor] BlizzardDrops your channelled area damage at the cursor with no confirmation click. On multi-target pulls this is pressed on cooldown, so the saved click adds up fast.
Cancels your current cast and blocks, and the exclamation mark stops a second press from dropping the block again. Panicking and mashing the key is exactly when you cannot afford it to toggle off.
#showtooltip Ice Block
/stopcasting
/cast !Ice Block