Supersonic? I don’t think so.
His rate of fall will be supersonic (about 640 mph at altitude) but the wind force on his body will never go over probably 130 mph or so (whatever normal freefall terminal velocity is for his body size and mass.) The air is very thin at altitude.
Heck, he probably won’t even hear an airstream going past his helmet until he hits 70K or so.
Read Kittinger’s book. he hit like Mach .95 (some say he did Mach 1). He describes the whole event of his jump in 1960. It’ll make your hair stand up.