Departing a regional CTAF on VFR flight into CTA, called CTR and gave departure report as usual, CTR came back " XXX squawk code 3361, clearance entre CTA on track dct XXXX climb FL140, only radar observed traffic in the area is 3.5nm south XXXX heading 180 passing 3500', intentions unknown, oh wait, . . . . thats you, . . . disregard traffic."
Laughter then heard from unknown station.