Mobs will let you spam it on them though so you're more likely to see the big hits and remember them. My PvE best (only happened once):

A surly dwarven lieutenant averts his gaze for a second, and you rush in to make him pay!
Your cleave * DEMOLISHES * a surly dwarven lieutenant!
Your cleave * DEMOLISHES * a surly dwarven lieutenant!
Your cleave * DEVASTATES * a surly dwarven lieutenant!
Your cleave * DEVASTATES * a surly dwarven lieutenant!
Your cleave * DEMOLISHES * a surly dwarven lieutenant!
A surly dwarven lieutenant gets a short-hafted lucerne hammer of polished steel.
A surly dwarven lieutenant averts his gaze for a second, and you rush in to make him pay!
Your cleave * DEVASTATES * a surly dwarven lieutenant!
Your cleave * DEVASTATES * a surly dwarven lieutenant!
Your cleave * DEVASTATES * a surly dwarven lieutenant!
Your cleave * DEVASTATES * a surly dwarven lieutenant!
A surly dwarven lieutenant wields a short-hafted lucerne hammer of polished steel.

And vs. Teg in PK, 3 was uncommon but did happen:

Tegerek averts his gaze for a second, and you rush in to make him pay!
Your cleave *** DEVASTATES *** Tegerek!
Your cleave === OBLITERATES === Tegerek!
Your cleave *** DEMOLISHES *** Tegerek!
Tegerek is writhing in agony.

Full log here: qhcf.net/phorum/read.php?3,1124764,1124764#msg-1124764