I have a tendency to yarn over in random spots making a perfect hole the next time I pass over. It's frustrating when I notice it a few rows up. Then I have to tink back to get it out. I'm sure there's a way to fix it, but I haven't figured that out yet.
Yeah, just drop the yo and the stitch that it made, the extra yarn from it will work into the nearby stitches when you wash or block it and even out.