I tried this as it is written, just out of curiosity and this is what I came up with.
Do a M1 stitch in the bar between the stitches, but don't slide it off. (lift the bar between the stitches with your left needle and knit into the back of it.)
Bring your yarn between the needles to the front and p the two next loops that are on the needle together but don't slide it off.
Bring the yarn to the back, and knit these two together again, and then slide everything off.
It was very tight on the yarn and needles I tried this on, and it's hard to see what it's supposed to look like just doing it once, but this is what I came up with.