Good question. For one, it's unique and relatively easy to
remember. Not like there's
a thousand "House of Thud"s out there.
To me though, it's an onomatopoeia
that can mean the sudden arrival of a strange but perhaps useful thought.
"I was just sitting there then *thud*, I realized how it all
worked."
Or the state of being here now, and the stickiness of the sound. Something
that
goes *boing* has bounced away.. something that goes *splat* hit way too
hard and left a mess,
but *thud* is just right. No rebound, no mess, just a state of being
at the point
of impact. Being here, now. (Yes, I'm making it all up.)
Other than that, it represents the sound you feel in your body from some of
my
favorite things. The thud of thunder in your body that's
so close that the
flash and boom come nearly at the same time. Feeling a large
explosion through
the ground before the sound reaches your ears (I hate how the movies and TV
always
sync up the sound with the sight. It should be vision first, then
shockwave through
the ground, then sound). Big drums.. Koto,
Jimbe, marching bass drums and
so forth. I like a drum that can literally take your breath
away.
Thud is whatever you want it to be.