Definitely one of the dopest rap hits out right now. "Mercy" has given me a new respect for Kanye, and is making me pay closer attention to Big Sean. Always thought Big Sean should come slightly more hardcore being that he's from Detroit. His music was sounding alittle 'popish' until he got on 'Mercy' with Kanye, Pusha T, & 2 Chainz. This is a nice little group here with Pusha T (& kanye) serving more as the anchor (with deeper Hip Hop roots). The video…