I recognise what you mean.
I recall getting that after making sudden explosive movements without a warm-up or anything (like getting up too quickly after having sat still for a while). It often goes together with some dizziness.
I interpret it as a sign that what I just did was a bit hard on the cardiovascular system. You use up a lot of energy while your heart rate is still low, making you dizzy because your brain doesn’t get enough nutrients for a second; so then your heart rate speeds up to compensate, making you see your pulse in your eyes. The sensation of repaying an energy debt.
At any rate I think it’s normal. Either that or we both have the same problem. :P
Additional ramblings:
I think I get similar symptoms when I’ve been bicycling like I’m late for something important, and then suddenly have to stop for a traffic light. I think that’s the other way around; having a high heart rate and then suddenly not spending the additional energy any more.
Sometimes I also feel my pulse in the roof of my mouth. And I can get dizzy and sometimes nauseous, if I’ve really been overexerting myself.
I don’t get it when actually working out. Probably because I’m prepared for it then. There could also be some reaction involved that makes one less sensitive to subtle things like that when doing hard work.
Come to think of it, I’m not sure when I last experienced this. It might have been before I started taking working out seriously.