▁himself , ▁singing ▁cow boy ▁on ▁stage ▁ ▁Jeff rey ▁Tamb or ▁as ▁Adam ▁Sh adow child , ▁a ▁famous ▁science ▁fiction ▁writer ▁ ▁Steven ▁Spiel berg ▁as ▁Him self ▁( voice ) ▁ ▁In ▁an ▁interview ▁for ▁the ▁DVD ▁release ▁of ▁Paul , ▁Peg g ▁and ▁F rost ▁said ▁they ▁made ▁the ▁film ▁to ▁demonstrate ▁their ▁love ▁for ▁Steven ▁Spiel berg ' s ▁films ▁Close ▁Enc oun ters ▁of ▁the ▁Third ▁Kind ▁and ▁E . T . ▁the ▁Ext ra ▁Terr est rial , ▁as ▁well ▁as ▁their ▁favour ite ▁science - f iction ▁films . ▁After ▁they ▁mentioned ▁the ▁project ▁to ▁Spiel berg , ▁he ▁suggested ▁he ▁might ▁make ▁a ▁came o ▁appearance , ▁and ▁a ▁scene ▁was ▁added ▁to ▁include ▁him ▁as ▁a ▁voice ▁on ▁a ▁speaker phone ▁in ▁ 1 9 8 0 ▁discuss ing ▁ideas ▁with ▁Paul ▁for ▁his ▁soon - to - be come ▁box ▁office ▁hit ▁E . T . ▁the ▁Ext ra - T err est rial . ▁According ▁to ▁Robert ▁Kirk man , ▁he , ▁along ▁with ▁Inv inci ble ▁co - cre ator ▁C ory ▁Walker ▁and ▁Inv inci ble ▁artist ▁Ryan ▁Ott ley , ▁had ▁a ▁came o ▁in ▁the ▁film ▁as ▁the ▁Big ▁Guy ' s ▁hen ch men . ▁ ▁Production ▁ ▁The ▁idea ▁for ▁Paul ▁came ▁from ▁Peg g ▁and ▁F rost ▁in ▁ 2 0 0 3 , ▁while ▁they ▁were ▁film ing ▁Sh a un ▁of ▁the ▁Dead . ▁To ▁help ▁with ▁the ▁script , ▁Peg g