▁distance ▁before ▁the ▁final ▁set ▁of ▁rails . ▁ ▁Sun ken ▁roads ▁are ▁very ▁technical , ▁especially ▁at ▁the ▁upper ▁levels , ▁and ▁require ▁accurate ▁r iding . ▁A ▁bad ▁approach ▁or ▁extra v ag ant ▁jump ▁in ▁can ▁possibly ▁ru in ▁the ▁r ider ' s ▁distances , ▁which ▁may ▁result ▁in ▁a ▁stop ▁from ▁the ▁horse , ▁or ▁a ▁fall . ▁Additionally , ▁the ▁quick ▁change ▁in ▁the ▁type ▁of ▁obst acle , ▁from ▁u pr ight ▁f ence , ▁to ▁down ▁bank , ▁to ▁up bank , ▁makes ▁it ▁phys ically ▁difficult ▁for ▁r ider ▁and ▁horse . ▁It ▁thus ▁requires ▁that ▁both ▁horse ▁and ▁r ider ▁are ▁bal anced , ▁and ▁that ▁the ▁r ider ▁stays ▁centered ▁and ▁follows ▁the ▁motion ▁of ▁their ▁mount . ▁ ▁Table ▁ ▁A ▁table ▁is ▁a ▁f ence ▁with ▁height ▁and ▁width , ▁with ▁the ▁top ▁of ▁the ▁table ▁being ▁one ▁piece ▁of ▁material ▁( un like ▁an ▁open ▁ox er , ▁which ▁is ▁not ▁" filled ▁in "). ▁The ▁horse ▁is ▁encourag ed ▁to ▁jump ▁over ▁the ▁entire ▁obst acle ▁at ▁once , ▁similar ▁to ▁an ▁ox er , ▁however ▁there ▁are ▁times ▁where ▁the ▁animal ▁may ▁accident ally ▁touch ▁down ▁on , ▁or ▁" bank ," ▁the ▁top . ▁Because ▁of ▁this , ▁tables ▁should ▁be ▁built ▁strongly ▁enough ▁to ▁support ▁the ▁horse ▁landing ▁on ▁it . ▁ ▁T ables ▁are ▁also ▁usually ▁built ▁so ▁that ▁the ▁back ▁part ▁is ▁slightly ▁higher ▁than ▁the ▁front , ▁or ▁with ▁a ▁piece ▁of