108682-quick-question-what-is-impulse

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I expect this will fall off the forum pretty quick, but does anybody know what impulse is? What does it do? I try to search for it and I keep getting web pages for guilds with Impulse in the name!
 
When you kill mobs, usually a lot of them, this little pop up of "Impulse x5" pops up and sometimes "Impulse x10" 
 
 
 
Is this some form of xp multiplication/modification? Is it some stat hidden from me? Does this have an effect on drop rates? (AKA contribute to diminishing returns?)
 
I just wanna know (because I feel sorta stupid not knowing what a constant game mechanic is lol)	
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			I believe it boosts experience and % gained from kills for quests.  I can't be sure, though, until I get home and check.  But I think kill strings in groups hurry along quests, IIRC.	
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			I originally thought it was an xp boost, and maybe it is, but I have not seen a variance in EP gain when impulsex5 procs. You may be right and it may only apply to quests and non 50s.	
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