Echo, Echo

When you think of an echo, do you picture a small person standing at a big cliff yelling into the abyss, and the abyss yelling back? That's what I picture.

I don't picture that annoying black spot (or blue if your eyes are closed) that clouds your vision after you stare into a bright light. I also don't picture the after taste of strawberries. Nor do I picture the throbbing sensation that remains after someone pokes you where you are bruised. But - aren't these all echoes? Just not the auditory kind.