The accusative absolute is a grammatical construction found in some languages.
In ancient Greek, the accusative case is used adverbially with participles of impersonal verbs, similarly to the genitive absolute.
[1] For example: συνδόξανsundóxanseeming good-ACCτῷtôithe-MASC.DAT.SGπατρὶpatrìfather-DATκαὶkaìandτῇtêithe-FEM.DAT.SGμητρὶmētrìmother-DATγαμεῖgameîmarriesτὴνtḕnthe-FEM.ACC.SGΚυαξάρουKuaxárouCyaxares-genθυγατέραthugatéradaughter-ACCσυνδόξαν τῷ πατρὶ καὶ τῇ μητρὶ γαμεῖ τὴν Κυαξάρου θυγατέραsundóxan tôi patrì kaì têi mētrì gameî tḕn Kuaxárou thugatéra{seeming good-ACC} the-MASC.DAT.SG father-DAT and the-FEM.DAT.SG mother-DAT marries the-FEM.ACC.SG Cyaxares-gen daughter-ACC"It seeming good to his father and mother, he marries the daughter of Cyaxares."
(Xenophon, Cyropaedia 8.5.28)In German, a noun phrase can be put in the accusative to indicate that the sentence's subject has the property it describes.
[2] For example: Nebennext toihmhimsaßsatderthedünnhaarigethin-hairedPianist,pianistdenthe-MASC.ACC.SGKopfheadimin theNacken,neckundandlauschte.listenedNeben ihm saß der dünnhaarige Pianist, den Kopf im Nacken, und lauschte.