In reference to the id Software release "Quake" (1996); the line implies that the person in question has the aptitude greater than or equal to that of the Waco Kid's (Billy the Kid) firing abilities, in that they can quickly approach, defeat, and move on.
Most likely saying that his beats shake like waco, since Waco, TX has the Balcones Fault to it's North. It may also be a double entendre, referring also to the Waco incident linking it to Quake the videogame.
Shaquille O'Neal is claiming that he likes character Bullwinkle J. Moose from the 1950s/60s cartoon Rocky (a squirrel) and Bullwinkle (a moose), probably because Shaq and Bullwinkle are both large and very strong
He is saying he would do good things for you to change your life, so it will make you feel good, therefore effecting the color of the mood ring. A mood ring is a ring that changes color according to body temperature and supposedly also your mood.
a reference to the fact that Jay Z's November 25th, 2003 show at the Madison Square Garden venue in New York City to promote The Black Album sold out in less than 24 hours (on September 27th).
"suicide" doors on cars open opposite the normal direction of car doors. some people change their doors to open this way to look cool, but they were also standard on some older cars - dangerous with poor visibility when exiting (you could kill yourself).
Gale Sayers was a Hall Of Fame running back for the Chicago Bears in the '60s/'70s. He is remembered as one of the most elusive running backs to ever play the game. Ghostface is saying he is as elusive/skilled on the mic as Sayers is on the field.