1 8 0 ▁into ▁f ak ie ▁fee ble , ▁and ▁the ▁al ley - oop ▁ 1 8 0 ▁into ▁switch ▁sm ith . ▁These ▁two ▁moves ▁are ▁so ▁rare ▁as ▁to ▁have ▁never ▁been ▁given ▁proper ▁names . ▁It ' s ▁unlikely ▁to ▁encounter ▁either ▁of ▁these ▁tr uck s ▁unless ▁the ▁r ider ▁is ▁sk ating ▁on ▁transition . ▁▁ ▁Ben nett ▁gr ind ▁Popular ized ▁by ▁Matt ▁Ben nett . ▁For ▁a ▁Ben nett ▁gr ind ▁the ▁r ider ▁must ▁approach ▁front side ▁and ▁do ▁a ▁back side ▁ 1 8 0 ▁into ▁a ▁switch ▁back side ▁sm ith ▁gr ind . ▁This ▁trick ▁name ▁is ▁exclus ively ▁for ▁the ▁version ▁of ▁the ▁trick ▁where ▁the ▁r ider ▁approaches ▁front side . ▁ ▁Bar ley ▁gr ind ▁The ▁opposite ▁of ▁a ▁Ben nett . ▁The ▁r ider ▁approaches ▁back side ▁and ▁does ▁a ▁front side ▁ 1 8 0 ▁into ▁a ▁switch ▁front side ▁sm ith ▁gr ind . ▁This ▁trick ▁name ▁is ▁exclus ively ▁for ▁the ▁version ▁of ▁the ▁trick ▁where ▁the ▁r ider ▁approaches ▁back side . ▁ ▁Cav eman ▁gr inds ▁A ▁cav eman ▁gr ind ▁is ▁when ▁a ▁sk ater , ▁instead ▁of ▁o ll ie ing ▁up ▁onto ▁a ▁rail , ▁starts ▁with ▁the ▁board ▁in ▁his ▁hand , ▁places ▁it ▁onto ▁the ▁rail ▁in ▁the ▁desired ▁gr ind ▁position ▁and ▁at ▁the ▁same ▁time ▁j umps ▁onto ▁the ▁board , ▁starting ▁the ▁gr ind . ▁▁ 5 - 0 ▁hand ▁drag ▁This ▁trick