Whoopin' the Blues

"Ryder's harp sounded like a freight liner chugging down the rails. He'd suck out a long wah-wah whistle like you imagine hearing after midnight when a diesel's pulling through town with no one to appreciate it unless it makes some noise. Then when Jim picked and sang a Saturday night special like "'Whoopin' the Blues' or 'Sittin' on Top of the World,' Ryder would rock back and forth on his feet and put both lungs to work with thrills and flutters, throat pops and hand smacks, all the while staying in perfect time with Jim's guitar."

Bluesman by Andre Dubus III