{Gravecrawler} + {Grimgrin, Corpse-Born} + {Rooftop Storm}
Free wimps for the big man to buff up on! And when M13 brings out that trample ring this will be pretty scary IMO.
I use this in my EDH Grim Grin deck. It is even funnier with {leyline of anticipation} out. Swing then flash gravecrawler out, sac, etc. Same goes with blocking :P