Mickey Factz passed through my show on 1xtra and blacked out, hard.
He kinda kills it, goes in, smacks it, etc. He sharpens his blade across Hip-Hop, Dubstep, and Funky House.

Not many MC's can do this. Seriously, aside from Asher Roth and a few others, very few people can actually freestyle live on air.

Pre-written stuff is cool, etc. but you would be suprised at how many people 'don't feel well', or 'have a cold', or 'are tired' when asked if they want to grab the mic.