Me, finally figuring out whats going on, responding in a voice of cruel and terrible glee: "No. I Use Linux."
Him, dumbfounded: "Ohhhhh."
Me, laughing a bit: "Anyway, have a nice day."
Him: "Wait! I'll transfer you to our linux departmentI I'll transfer you to our linux department!"
Me: *Hangs up*
In retrospect I really regret it, I should have kept him on the line and fucked with him more. Huge missed opportunity. Oh well. XD