▁hy enas ▁and ▁the ▁lower - lip ▁sc ow l ▁of ▁be ars ▁as ▁touch st ones . ▁While ▁speaking ▁of ▁the ▁in exp lic able ▁nature ▁of ▁Pen ny wise , ▁Sk ars g år d ▁stated : ▁" L ed ger ' s ▁J oker ▁is ▁root ed ▁in ▁the ▁real ; ▁you ▁can ▁break ▁down ▁the ▁psych ology . ▁But ▁Pen ny wise ▁is ▁not ▁a ▁real ▁person ." ▁Sk ars g år d ▁explained ▁that ▁Pen ny wise ' s ▁succ inct ▁sh uff les , ▁whilst ▁attack ing ▁and ▁lung ing ▁toward ▁his ▁targets , ▁were ▁inspired ▁by ▁his ▁little ▁brother , ▁O ss ian , ▁to ▁which ▁he ▁stated : ▁" I ▁don ' t ▁know ▁if ▁you ' ve ▁seen ▁k ids ▁run ▁like ▁this , ▁but ▁they ▁move ▁their ▁arms ▁way ▁too ▁fast , ▁and ▁it ▁looks ▁really , ▁really ▁fun ny . ▁And ▁I ▁just ▁loved ▁the ▁way ▁my ▁brother ▁ran ▁as ▁a ▁kid . ▁It ▁was ▁just ▁out ▁of ▁sync . ▁So ▁I ▁incorpor ated ▁that ▁into ▁the ▁character , ▁and ▁you ▁get ▁this ▁really ▁explos ive ▁effect . ▁It ' s ▁really ▁un sett ling ▁when ▁it ▁happens ." ▁ ▁In ▁approaching ▁the ▁story , ▁Barbara ▁Mus chi etti ▁referred ▁to ▁Stephen ▁King ' s ▁It ▁( 1 9 8 6 ) ▁as ▁" our ▁b ible ", ▁while ▁thinking ▁it ▁to ▁be ▁interesting ▁to ▁respect ▁the ▁proper ▁chron ology , ▁with ▁the ▁Mus chi etti ▁sib lings ▁going ▁into ▁the ▁casting