# TODO: if we need to jibber the frobnitz, we might want to reformat the data like
    # $lag_load{$lag_traffic} = [ [ $inVal1, $outVal1 ], ... ];
    # or
    # $lag_load{$lag_traffic} = [ { in=>$inVal1, out=>$outVal1 }, ... ];
    # be sure to update the zig_zag_report subroutine accordingly!