You know it's been too long since you mowed when....
you're thankful the dog is at a friend's house because we probably would have lost her in the grass.
you're not sure why the grass is yellow after you cut it...is the weed killer actually working or did it just get so long that it killed everything underneath?
you are seriously considering buying a hay baler then seeing if you can sell the hay you cut.
it is so very, very obvious whenever you miss a spot because the grass that you missed is about 2 feet tall.
you forget that you have a couple of pretty big holes in your yard and then proceed to step in them.