Option A: It's a legitimate grammatical error on the part of the writer, which, of course, does happen.

Option B: It's a deliberate misspeak by the character, because in the real world, no one uses proper grammar when they speak 100% of the time, and as such, do actually make up words, misuse grammatical format, and even sometimes just ramble.

I cannot speak to which option this is: I just tend to go with  the flow.