I love biggies delivery..
Sometimes his rhymes dont even rhyme every line, but the way he breaks down a sentence ... makes it superb.. sometimes he would just rhyme 2 words per line with a lil pause and the line seems complex...
Blood rushin'
concussion
sipping black russian's .. etc.. 
awesome. 
At first, when i heard that freestyle in mp3, i thought he just did a song, but actually its the other way, he freestyled it and the acapela was used for a lot of songs after... and you couldn't really tell a difference. Watching it live though.. it makes it clear the dude was thinking it up right away. 
BTW.. 
http://youtube.com/watch?v=ZmI0pjszeZU - this song is one of the best club tracks ever. Yet ive only heard it play once in the clubs i been too. -_- . Once i made a request from the dj, he didnt even know this shit and he played Juicy instead. 
