While keyboardist Herbie Hancock had gone electric with Miles Davis, and in his outward-looking solo projects before Head Hunters, nothing he’d done previously packed such a deep funk groove. It's particularly evident on the rump-bumpin’ “Chameleon,” and there's more than a subtle nod to Sly Stone on "Sly." The tribal-electric version of “Watermelon Man” reveals just how far the band was willing to go—and Hancock's use of cutting-edge synthesizer technology made it all the more funky.