Welcome
I have to ask, if you are really jumpy?
I have something similar happen to me, and if someone sneeks up on me, or I am anticipating "know" something is about to happen, I look away or
close my eyes in anticipation of this event and if my eyes are closed and my reflexes kick in, I too see a spark,color, almost like electric sound.
I have found that it is from my natural jumpiness, and all my co-workers and family/friends exploit this just to watch me jump, I guess its in good
fun, no harm intended I'm sure! I just don't think they understand how bad it affects me.

