▁the ▁enfor cement ▁task ▁can ▁be ▁significantly ▁complex ▁and ▁the ▁results ▁are ▁usually ▁controvers ial . ▁This ▁creates ▁t ension ▁between ▁all ▁rac ers ▁and ▁between ▁rac ers ▁and ▁the ▁track ▁operators ▁as ▁well . ▁ ▁The ▁popular ▁United ▁States ▁cable ▁television ▁program ▁" P inks " ▁( Speed ▁Channel ) ▁uses ▁the ▁TV ▁shows ▁host ▁as ▁a ▁flag man ▁with ▁an ▁arm ▁drop ▁technique ▁at ▁the ▁start ▁line ▁( plus ▁finish ▁line ▁human ▁spot ters , ▁and ▁camera ▁" photo ▁finish es " ▁similar ▁to ▁those ▁used ▁in ▁horse ▁racing ▁and ▁dog ▁racing ). ▁This ▁sim ul ates ▁drag ▁racing ' s ▁historic ▁roots ▁of ▁post ▁W W II ▁street ▁racing ▁of ▁the ▁ 1 9 4 0 s , ▁and ▁non - elect ron ic ▁drag ▁strip ▁racing ▁of ▁the ▁ 1 9 5 0 s ▁and ▁ 1 9 6 0 s . ▁The ▁delay ▁box ▁is ▁useless ▁in ▁P inks , ▁since ▁the ▁first ▁pass ▁is ▁run ▁with ▁the ▁Pro ▁tree ▁(. 4 0 0 ▁three ▁am bers ) ▁instead ▁of ▁the ▁Standard ▁Tree ▁(. 5 0 0 ▁per ▁light ), ▁and ▁the ▁second ▁pass ▁and ▁all ▁elimin ations ▁are ▁run ▁with ▁an ▁arm ▁drop , ▁which ▁forces ▁the ▁driver ▁to ▁launch ▁at ▁the ▁host ' s ▁order , ▁and ▁not ▁by ▁a ▁delay ▁box . ▁ ▁Category : Drag ▁racing ▁Category : Autom ot ive ▁techn ologies <0x0A> </s> ▁She k ▁Wu ▁H ui ▁() ▁is ▁a ▁non - admin istr ative ▁sub div ision ▁( ne igh