You could always pop force shroud before force lightning...
This is good advice, anyone doing this in pvp should always always pop shroud before hitting a 3 stack lightning, too many knockbacks and stuns to avoid otherwise.
"Ah that explains it. Knowing that really makes me not care about the skill anymore as any non idiot will easily interrupt it anyways. Time to go back to deception."
Funny thing is..."interrupt" is exactly what they can't do according to tooltip lolz, even without shroud.