Yesterday I fertilized a yard which the homeowner mows. When I approached the property I thought man does it look like ****. Usually it looks awesome. The tips of the grass looked like it had been mowed with a 2x4 or something possibly even duller. I didn't think the homeowners were home so when I was done spreading the fertilizer I started up the blower and began clearing the driveway and sidewalk. Then "she" came out. "My yard looks like crud. You haven't been fertilizing it correctly" Me-Uhhh, when was the last time you sharpened the blade on your mower? "My hubby just changed it last week right before I mowed the lawn" Me-Do you mind if I take a look at the mower? "Why?" Me- I'm just concerned about your lawn. "OK" Well I tilt up the push mower and yup the blade which wasn't even the correct type of blade was on upside down. I proceeded to briefly tell her she had just given her lawn a beating much like Mike Tyson used to administer. Hopefully the lawn will recover but man did it look awful. Being the nice guy I am I took her old blade which was still fairly sharp and sharpened it for her. Today I will go back and reinstall it on her mower. If she EVER cancels me for fert service I will go off on her.