"THUD...THUD...THUD....THUD....THUD....THUD"
These are the sounds of a little body coming down the stairs.
Not falling down the stairs (despite how it may sound),
But sliding down the stairs in 1.2 seconds flat.
Belly surfing without belly calluses-magical!
P.S. We do not even notice the sound of it anymore, but it sure does scare the H*** out of visitors! :)