Caused by certain African-American hairstyles that give an aerodynamic/hydrodynamic advantage, i.e. VERY tight corn rows.
::In a Football Game character creator::
E. says, "There, I'll give my new WR corn rows for better speed and hydrodynamics in the rain, LOL"
C. says, "No, you mean NEGROdynamics"
E. & C., "LOLOLOLOLOL"