DUELING BANJOS? NO! JUST DUELING VENDORS! A rare sight. There is an unwritten rule among vendors that only one person per item serves an aisle. This is still true at both baseball parks, but not so at Soldier Field...where those long aisles are like the "wild wild west" and many vendors might compete for sales in one. Ed Carney and Woodrow Wilson Walker duel for an aisle at old Comiskey Park. 1975.