Cumulonimbus
"Cumulonimbus - a vertically developed cumulus cloud, often capped by an anvil shaped cloud. Also called a thunderstorm cloud, it is frequently accompanied by heavy showers, lightning, thunder, and sometimes hail or gusty winds." If this definition doesn't give you an idea of what this original composition holds, then visit Kansas in tornado season! 104 measures are filled with techniques, meter changes, dynamic shifts, and the kitchen sink (just kidding!)