It's been on my listen list a while now (it being a Lampmode release and all) and I finally got round to beginning to check Evangel's 'Expository Journey'. The first track proper is a duet with Mac The Doulos called 'Stranger 2 Stranger'.
If you're the type who learns from rap lyrics, and indeed learns rap lyrics by heart, then this track could really help you in situations where you're sharing the gospel. The unbeliever in the track throws up the most common objections to Christianity and the believer tackles each one graciously and succinctly - kinda like an easy-to-remember rap catechism!
Props to whoever uploaded this to Youtube with all the lyrics.