Guitar/bass plays this in dropped-D tuning (DADGBE):
/ / / / / / / /
|--------------------|-----------------------|
|--------------------|-----------------------|
|--------------------|-----------------------|
|--0---0---0---------|--0---0---0------------|
|--0---0---0---------|--0---0---0------------|
|--0---0---0---3--5--|--0---0---0---6--5--3--|
Dm Dm
and Dave plays this bass line during the beginning:
/ / / /
|-----------------------------------|
|-----------------------------------|
|-----------------------------------|
|-------10-10---10------12------10--|
|-----9-------9----9----------9-----|
|--10----------------10----10-------|
Dm
/ / / /
|------------------------------|
|------------------------------|
|------------------------------|
|------10-10---10---9/10-9/10--|
|-----9------9------8/-9-8/-9--|
|--10---------------9/10-9/10--|
Dm
Verse 1:
Dm
Rock on my belly, lying on the bottom of the pool
Dm
I'm a rock on the belly, lying on the bottom of the pool
Dm
There's a man on the bank ten thousand years my younger
Dm
I see a face on the water one hundred, hundred
years my younger
[ Tab from: https://www.guitartabs.cc/tabs/w/widespread_panic/rock_tab.html ]
F Dm Dm F Dm Dm
|-----5-----5--7--------5-----5--7----|
|-----6-----6--6--------6-----6--6----|
|-----5-----7--7--------5-----7--7----|
|-----7-----7--7--------7-----7--7----|
|-----8-----5--5--------8-----5--5----|
|-------------------------------------|
But I can't go back, he can't go back
F Dm Dm Bb
|--5-------------5----7--1--------------|
|--6-------------6----6--3--------------|
|--5-------------7----7--3--------------|
|--7-------------7----7--3--------------|
|--8-------------5----5--1--------------|
|---------------------------------------|
I can't make it back to where I came
C Dm
As I hold my whole body under
Verse 2:
Legs, tail, and belly shaking the top of the pool
Legs, tail, and belly shattering the window of the pool
Mouth and belly scaring the fish down under
Tongue and belly scaring the snakes there too
But I can't go back - the dog won't go back
He won't run the path to his master's home
'Til he climbs that bank over yonder
Dm with bass riff throughout the rest of the lyrics
Well, the fish gonna make it home in a couple of days
The birds gonna make it home before his grip turns dry
Everybody's moving but me
Everybody's moving but me
I'm gonna make it home piece by piece
(x2)
There goes my arms *make it home*
There goes my legs *make it home*
There goes my leadbelly
I'm a rock on my belly lying in the bottom of a pool
Rock on my belly lying in the bottom of a pool
Rock on my belly (x4)
Rock on my belly lying in the bottom of a pool
end on Dm > Bb > C > Dm (i.e. "I can't go back...")