He had kept a supply of Booji Boy masks for several years , but due to improper storage , many of them ended up ruined from dry rot .
Mothersbaugh developed the character 's distinctive high pitched falsetto almost instantly .
Mothersbaugh had kept a supply of Booji Boy masks for several years , but due to improper storage , many of them ended up ruined from dry rot .
Mothersbaugh developed the character 's distinctive high pitched falsetto almost instantly .