"You talkin' to me? You talkin' to me? You talkin' to me? Then who the hell else are you talkin' to? You talkin' to me? Well I'm the only one here..." ala Travis Bickle, Taxi Driver
'um....did someone say something?'
or
'do you have a step ladder... or would you like me to get on my knees again?'
or
'now I cant imagine you and me ever seeing eye to eye you know.'