, which is also fine if you actually want to take the reader out of the narrative flow."
If you're screwing around with the reading experience because you don't understand what you're doing, that's bad.
If you're screwing around with the reading experience because you want the reader to have a screwed up reading experience for some reason, that's fine.
It's like atonal (which is a misnomer, but you all know what I mean) music. It breaks all the rules and it's not a "pleasant" listening experience, but it's not meant to be. Sometimes you just want to mess with people's heads.