am say same thing O.P said , how come there aint no vid of jay doing this? i dont believe witness accounts , at least with wayne ive said vid of him doin the punch in method which is much more believable thanremembering a whole song and spitting it on one take
There’s a video of Jay at Rick Rubin’s studio writing the entirety of 99 Problems in his head and then laying it in the booth. Its from the Fade To Black documentary.
If i’m not mistaken he did the same thing with Lucifer in the studio with Kanye.