FLC OF CPR LTT ON SID IS GIVEN INSTRUCTIONS BY 2 CTLRS AT SAME TIME; WITH VARIOUS HDG CHANGES AND FREQ CHANGE 'NOW.' NO TFC INDICATED OR SIGHTED.

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FLT FROM HPN TO CGF. DEPARTED RWY 34. CLRNC WAS WESTCHESTER 9; RADAR VECTORS ELIOT -- SUBSEQUENT ROUTING AND AN INITIAL ALT OF 3000 FT. A FEW SECONDS AFTER TKOF WE WERE INSTRUCTED TO CONTACT DEP CTL; WHICH WE DID AND FOR A VERY BRIEF TIME RECEIVED NO RESPONSE. THEN; DEP CALLED AS IF SHE HAD BEEN TRYING TO REACH US. AT THE SAME TIME WE HEARD A SECOND CTLR GIVING US INSTRUCTIONS. WITHIN A FEW SECONDS; AND BY 2 CTLRS; WE WERE GIVEN INSTRUCTIONS TO EXPEDITE A CLB TO 3000 FT; 2 HDG CHANGES AND A FREQ CHANGE; NOW! GIVEN THE TONE IN THE VOICE OF ONE CTLR; WE DID NOT KNOW IF WE HAD MISSED A COM OR HAD BLOCKED A XMISSION. GIVEN OUR PERCEPTIONS; WE TRIED TO FOLLOW THE MOST IMMEDIATE INSTRUCTIONS OF THE CTLR. NO REASONS FOR THESE IMMEDIATE CHANGES WERE GIVEN; NO CONFLICT EVER IDENTED AND TO THE BEST OF MY KNOWLEDGE NONE OCCURRED. THE FLT CONTINUED WITHOUT INCIDENT. POSSIBLE CONTRIBUTING FACTORS: 1) MAY HAVE BEEN A BLOCKED XMISSION. 2) A MOMENTARY DELAY IN COMPLIANCE MAY HAVE RESULTED DUE TO 2 CTLRS GIVING INSTRUCTIONS AT THE SAME TIME.