Currently doing some beginner practice with Alexander Lenard's translation of Winnie the Poo. It says, "Ecce Eduardus Ursus scalis nunc tump-tump-tump occipite gradus pulsante post Christophorum Robinum descendens."

'Occipite' is in the imperative mood, but why? I don't see how the context calls for it. Any help is appreciated.

Currently doing some beginner practice with Alexander Lenard's translation of Winnie the Pooh. It says, "Ecce Eduardus Ursus scalis nunc tump-tump-tump occipite gradus pulsante post Christophorum Robinum descendens."

'Occipite' is in the imperative mood, but why? I don't see how the context calls for it. Any help is appreciated.