Here’s a screenshot of a Vengeance tank DH dealing almost 12k with a button press, deleting me and a frost mage with his ice barrier ( lvl 60 ) in the process at 75% health.
At first, I thought the mage blinked but the man got evaporated.
I noticed they’ve been melting adds in dungeons and people in pvp but didn’t really bother to check.
I honestly thought this was a new design for the spec … but 12k one button press ? Also, the spell says 2k3 damage. What sort of damage multiplier makes a 2k a 12k ?
If you fully geared lvl 60 right now you have about 24k healh - said ability normally does 4-5k damage which is exactly 20% of your health (ice barrier 22% max health) this skill have 2 second delay before explosion which allows counterplay (blink, ice block, rewind time, walk away).
In your particular case it critted and probably was used in conjunction with stat trinket or prock so damage was doubled which is unfortunate for you. Still not even close to stuff like double tap aimed shot (also 1 min CD) from the stealth in terms of damage and/or counterplay potential.