Christopher Lee Rios , better known by his stage name Big Pun , was a Puerto-Rican American rapper who emerged from the underground rap scene in The Bronx in the late 1990s. He first appeared on albums from The Beatnuts, on the track "Off the Books" in 1997, and on Fat Joe's second album Jealous One's Envy in 1995, on the track "Watch Out", prior to signing to Loud Records as a solo artist. Pun's lyrics are notable for technical efficiency, having minimal pauses to take a breath, heavy use of alliteration as well as internal and multi-syllabic rhyming schemes. Big Pun died of a heart attack at age 28. About.com ranked him #25 on its list of the 50 Greatest MCs of Our Time , while MTV2 ranked him #11 on its list of the "22 Greatest MCs."