Feel So Bad
as performed by The Derek Trucks Band

The basics - I-IV-V, the dtb version is in C.
but the line is C-C-C (i kinda hammer from the B flat to C on these) G-B flat-C-B flat- C
and the line goes with the chords,etc."

EddieP confirms that's how they do Feel So Bad, and I'd take his word for it.