Spells: Vampiric Embrace, multiple procs

[fresus]

The way Vampiric Embrace works seems a bit odd.
Sometimes I get two procs in the same round, without performing a double attack with my weapon.
And a few times this evening, I performed triple procs:

[Tue Nov 30 23:44:35 2010] Gabam beams a smile at an initiate familiar
[Tue Nov 30 23:44:35 2010] Gabam says 'Ahhh, I feel much better now...
[Tue Nov 30 23:44:35 2010] an initiate familiar was hit by non-melee for 37 points of damage.
[Tue Nov 30 23:44:35 2010] An initiate familiar staggers.
[Tue Nov 30 23:44:35 2010] Gabam beams a smile at an initiate familiar
[Tue Nov 30 23:44:35 2010] Gabam says 'Ahhh, I feel much better now...
[Tue Nov 30 23:44:35 2010] an initiate familiar was hit by non-melee for 37 points of damage.
[Tue Nov 30 23:44:35 2010] An initiate familiar staggers.
[Tue Nov 30 23:44:35 2010] Gabam beams a smile at an initiate familiar
[Tue Nov 30 23:44:35 2010] Gabam says 'Ahhh, I feel much better now...
[Tue Nov 30 23:44:35 2010] an initiate familiar was hit by non-melee for 37 points of damage.
[Tue Nov 30 23:44:35 2010] An initiate familiar staggers.

My SK is lvl 25, so it can't be caused by a riposte.
Also I didn't slam at the same time (and I never saw a proc on slam anyway).