Not a teacher.
To me, it sounds as if a person is trying to avoid the use of a question tag. Perhaps you'll hear this in informal conversation, but I doubt that's normal English. Let's wait for a native speaker's comment.
Offtopic: your thread reminded me of my university days, when my peers would say "but you didn't give us any homework, right?", which made our English tutor grit his teeth.
Student or Learner