"Downpresser Man" is based on an older traditional song called
"Sinner Man" which asks, "Oh, sinner man, where are you going to
run to on that day (of judgment)?"  Here are the verses Peter
Tosh sings on the cd "The Toughest":

Downpresser man, where you gonna run to
Downpresser man, where you gonna run to
Downpresser man, where you gonna run to
All on that day

I wouldn't like to be a flea underneath your collar
I wouldn't like to be a flea underneath your collar
I wouldn't like to be a flea underneath your collar
All on that day

You can run but you can't hide
You can run but you can't hide
You can run but you can't hide
All on that day

Downpresser man, where you gonna run to
Downpresser man, where you gonna run to
Downpresser man, where you gonna run to
All on that day