Yup. I just did that.
My second roll shooting with the spinner 360 and I realized right after release that the switch was still in the R position. Hoping against hope I look at the film after processing. Sure enough, a Loooooooooooooong strip of black, er…white….er….you know what I mean. In the digital world you get to erase your mistake and there might be little if any evidence of the goof. I will forever keep 22A-27 of this roll as a reminder to check my settings prior to shooting, ESPECIALLY with the spinner.