It's because the screen shakes. Your mind is filling in the blanks. You are expecting to hear a sound and so your brain is telling you that there "should" be a sound and you sense it.
call me crazy but i don't hear pictures ?!?!
Also, some of you are quite weird.
I automatically imagine the thudding sound when it lands, and I imagine the swish and slap of the cables as they move and hit the ground. However, I don't physically hear anything.
I imagine the sound, and I do it on every iteration completely involuntary.