▁course ▁by ▁foot ▁several ▁times ▁to ▁get ▁a ▁grasp ▁on ▁it . ▁She ▁succeed s , ▁but ▁takes ▁the ▁longest ▁time ▁yet ▁at ▁ 5 5 ▁minutes . ▁Kevin ▁takes ▁so ▁long ▁on ▁the ▁challenge ▁that ▁the ▁sun ▁begins ▁setting , ▁forcing ▁the ▁crew ▁to ▁use ▁the ▁head light s ▁of ▁other ▁vehicles ▁to ▁mark ▁out ▁the ▁course ; ▁despite ▁all ▁this , ▁he ▁still ▁can ' t ▁complete ▁the ▁course ▁and ▁has ▁to ▁give ▁up ▁when ▁the ▁sun ▁completely ▁sets , ▁making ▁it ▁too ▁dark ▁to ▁continue . ▁ ▁The ▁Water ▁T ank ▁Challenge : ▁The ▁candidates ▁must ▁drive ▁a ▁modified ▁P T ▁Cru iser ▁with ▁a ▁roof - mount ed ▁water ▁tank ▁smooth ly ▁through ▁a ▁course ▁to ▁avoid ▁getting ▁wet . ▁Despite ▁resol ving ▁to ▁not ▁get ▁wet ▁at ▁all , ▁Andrew ▁is ▁spl ashed ▁for ▁the ▁fifth ▁straight ▁season ▁after ▁taking ▁a ▁sl alom ▁turn ▁too ▁wide . ▁Marg her ita ▁is ▁the ▁first ▁candidate ▁to ▁take ▁the ▁challenge ▁and ▁ends ▁up ▁sp illing ▁much ▁of ▁her ▁water ▁on ▁at ▁the ▁end ▁of ▁the ▁initial ▁straight ▁by ▁bra king ▁too ▁late . ▁Ch ery l ▁gets ▁spl ashed ▁the ▁most ▁during ▁their ▁run , ▁causing ▁her ▁to ▁acc use ▁Marg her ita ▁of ▁doing ▁it ▁on ▁purpose ; ▁she ▁los es ▁ ▁during ▁the ▁challenge , ▁most ▁of ▁which ▁was ▁lost ▁at ▁the ▁start ▁and ▁at ▁the ▁end ▁when ▁she ▁back ed ▁into ▁a ▁concrete ▁bar rier . ▁D iane ▁makes ▁a ▁similar ▁mistake ▁at ▁the ▁start ▁of ▁her