▁ ▁Sac char ine ▁Trust ▁Past ▁L ives ▁ ▁Son ic ▁Youth ▁" Dis app ear er " ▁( single ) ▁Go o ▁ ▁Un known ▁Inst ruct ors ▁The ▁Master ' s ▁Vo ice ▁ ▁Ex hib ition ▁history ▁ ▁Group ▁exhib itions ▁ ▁P ett ib on ▁began ▁exhib iting ▁his ▁work ▁in ▁group ▁shows ▁in ▁gall eries ▁in ▁the ▁ 1 9 8 0 s . ▁In ▁ 1 9 9 2 , ▁P ett ib on ▁was ▁invited ▁to ▁particip ate ▁in ▁Hel ter ▁Sk elter : ▁L . A . ▁Art ▁in ▁the ▁ 1 9 9 0 s , ▁cur ated ▁by ▁Paul ▁Sch imm el ▁at ▁the ▁Museum ▁of ▁Contempor ary ▁Art , ▁Los ▁Angeles ▁( MO CA ). ▁ ▁In ▁ 1 9 9 3 , ▁P ett ib on ▁was ▁included ▁in ▁the ▁Whit ney ▁B ienn ial . ▁By ▁the ▁mid - 9 0 s , ▁P ett ib on ▁had ▁exhib ited ▁extens ively , ▁including ▁exhib itions ▁at ▁the ▁Museum ▁of ▁Modern ▁Art , ▁New ▁York ; ▁the ▁Museum ▁of ▁Contempor ary ▁Art , ▁Los ▁Angeles ▁( MO CA ); ▁Kunst haus ▁Zur ich ; ▁White ▁Column s , ▁New ▁York . ▁In ▁the ▁late ▁ 9 0 s , ▁P ett ib on ▁to ▁exhib ited ▁intern ation ally ▁including ▁shows ▁at ▁the ▁Tr am way ▁( arts ▁centre ) ▁in ▁Glasgow , ▁Scotland , ▁the ▁Ham mer ▁Museum , ▁Los ▁Angeles ▁and ▁the ▁ 1 9 9 7 ▁Whit