A SINGLE PLT REQUESTED A POP-UP CLRNC FROM ZDV; DURING A FLT FROM 7V2 TO BJC; DURING WHICH HE OVERSHOT HIS ASSIGNED ALT AND THEN LATER EXPERIENCED HYPOXIA UNTIL HE STRAIGHTENED OUT HIS OXYGEN LINE WITH THE HELP OF HIS PAX.

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DURING A FLT FROM NORTH FORK VALLEY ARPT (7V2) TO JEFFCO ARPT (BJC); IT WAS CLR BELOW 14000 FT WITH A CLOUD DECK AT ABOUT 16000 FT OVER THE MOUNTAINS. AFTER CLBING TO 17500 FT AND SEEING THAT THE TOPS WERE STILL ABOVE MY ALT; I CALLED ZDV AND ASKED FOR A POP-UP IFR CLRNC TO BJC. THE CTLR GAVE ME A CLRNC THEN ASKED ME TO CALL DENVER RADIO TO FILE A FLT PLAN; WHICH WAS CONFUSING TO ME; WHICH STARTED MY PROB AND BY NOW; I HAD CLBED TO FL185 TO STAY OUT OF THE CLOUDS. AFTER FILING WITH DENVER RADIO; I RETURNED TO CTR FREQ AND THEY INSTRUCTED ME TO DSND TO 17000 FT; FLY TO POWDR INTXN; AND FOLLOW THE POWDR 5 ARR INTO JEFFCO. I TOLD CTR I DID NOT HAVE THE POWDR 5 ARR INFO AT HAND AND THEN I REMEMBERED I HAD NOT TOLD CTR WHEN I ASKED FOR THE POP-UP 'NO STARS NO SIDS;' AND TOLD THAT TO CTR SO THEY WOULD AMEND MY CLRNC FOR LNDG AT JEFFCO. IN DSNDING TO THE INSTRUCTED ALT AND TALKING TO CTR; I WAS HAVING A HARD TIME COMMUNICATING AND WAS FEELING LIGHTHEADED. MY WIFE WAS IN THE R SEAT AND TOLD ME MY OXYGEN LINE WAS CHINKED AND STARTED HELPING ME GET THE OXYGEN FLOWING PROPERLY. FROM THEN ON DURING DSCNT AND LNDG AT JEFFCO; EVERYTHING SEEMED OK. HOWEVER; BEFORE LEAVING CTR FREQ; THEY ASKED ME TO CALL WHEN I GOT ON THE GND. THEN I SWITCHED TO DEN APCH WHO BROUGHT ME TO JEFFCO WHERE I CANCELED THE IFR; RPTING JEFFCO IN SIGHT; THEN TALKED TO JEFFCO TWR AND LANDED. JEFFCO GND CTL DIRECTED ME TO PARKING AND BEFORE I PARKED; GND ASKED ME TO CALL DEN APCH WHEN I GOT TIED DOWN. SO; AFTER I SHUT DOWN AND TIED DOWN; I WENT TO A PHONE AND MADE BOTH CALLS; EXPLAINING WHAT HAD GONE ON DURING MY FLT. I WAS TOLD BY BOTH PARTIES THAT THEY WERE JUST CHKING TO BE SURE I HAD LANDED OK AND THAT I WAS ALRIGHT. I THANKED THEM AND THUS ENDS THIS RPT.