Nick Oliveri takes lead vocal duties on Quick And To The Pointless. Homme has mentioned in interviews that the vocal take used on the recording was originally just meant to be a scratch (ie rough) vocal for the band to work to while they recorded the instrument parts.
However, Homme and Oliveri both liked the rough and aggressive nature of vocal take that they kept it and used it for the finished recording. Which could explain the origin of Oliveri saying “I don’t even know what I’m doing here” at the beginning of the recording. Or maybe they just put that in because it sounded cool. Who knows? We’re just speculating here.
Great song though, and always a highlight of their live shows around that time.