▁of ▁Rel ativity , ▁which ▁he ▁calls ▁" C ra zy ▁St airs ." ▁He ▁then ▁breaks ▁it ▁while ▁playing ▁Ult imate ▁F ris be e ▁and ▁asks ▁" Oh ▁no , ▁did ▁that ▁hit ▁cra zy ▁st airs ? ". ▁A ▁later ▁episode , ▁" No ▁Me als ▁on ▁Whe els ", ▁features ▁Peter ▁compla ining ▁that ▁the ▁fact ▁that ▁his ▁new ▁restaurant ▁is ▁attract ing ▁par ap leg ics ▁" is ▁we ir der ▁than ▁that ▁rap ▁video ▁by ▁M . C . ▁E scher ." ▁E scher ▁is ▁then ▁dep icted ▁inside ▁Rel ativity ▁dressed ▁like ▁MC ▁Ham mer ▁in ▁" U ▁Can ' t ▁Touch ▁This ". ▁and ▁ra pping , ▁" Go ing ▁up ▁the ▁st airs ▁and ▁going ▁down ▁the ▁st airs ▁and ▁going ▁up ▁the ▁st airs ▁and ▁going ▁down ▁the ▁st airs ▁and ▁going ▁up ▁the ▁side ways ▁st airs ." ▁ ▁On ▁the ▁Sy F y ▁sci - fi ▁series ▁W are house ▁ 1 3 , ▁E scher ▁is ▁said ▁by ▁Le ena ▁to ▁be ▁one ▁of ▁the ▁architect s , ▁along ▁with ▁Thomas ▁Ed ison ▁and ▁Nik ola ▁T es la , ▁who ▁designed ▁the ▁W are house . ▁The ▁E scher ▁V ault ' s ▁design ▁res emb les ▁the ▁l ith ograph ▁Rel ativity . ▁Inside ▁this ▁v ault , ▁the ▁st air well s ▁and ▁walls ▁are ▁constantly ▁moving . ▁Anyone ▁not ▁we aring ▁spe cially ▁designed ▁glass es ▁run ▁the ▁risk ▁of ▁being ▁lost ▁forever ▁once ▁inside .