Hiero vs. Hobo

In 1994, Saafir made a brilliant guest appearance on Casual's debut album Fear Itself. Saafir wanted Casual to return the favor on his own debut, Boxcar Sessions, but for whatever reason Casual didn't show up. Saafir took it personally, and soon his crew, the Hobo Junction, was beefing with Casual's Hieroglyphics crew. They agreed to settle it in a battle broadcast on Sway and Tech's Wake Up Show. There was dispute about whether Saafir was using written rhymes, and whether he had warned he would do so beforehand. But when you hear him open his first verse "Did your momma tell you that you was my son," sounding "like he could swallow the fucking planet" (as Cocaine Blunts described him), it doesn't really seem to matter.

The entire battle is long (over 45 minutes) but there's stuff worth hearing throughout. Click the second link if you just want to hear the opening few salvoes from Casual and Saafir, before their soldiers get involved.

Hiero vs. Hobo (whole battle)
Casual vs. Saafir

Less remembered is the pre-battle battle which took place at San Francisco's Crash Palace. The sound quality is poor, but it's part of the history, so here you go:

Crash Palace battle