Has been pretty hot and dry here for months. Went out mowing today for the first time in a while. Most are still very dry and crispy. Get to this one lawn that has a garden. Its "Au-Natural". No fence, no pesticides, just WATER. Well about 4' around this garden, the grass (crabgrass/weeds) is over a foot tall. Have double blades on. Excaliburs on bottom and regular Gators on top. Help get ALL the buckhorn, etc. Anyway, I'm mowing around the "garden" and all of a sudden....Bam, whack, Bam, wack, schwing (a whole lota noise) !!!! Here the homeowner decided to pull weeds, AND rocks!!! Ran over a nice pile of 4" rocks. Hit them with my trim side of the deck. They went through and hit every blade!!! OF Course, they were fairly new and perfect blades. Got 6 blades with some sort of large nicks in them. The bad one in the picture is going in the trash tonite. Its just too far gone. The other one was useable, so I just touched it up. Tip to tip was only 20-1/4", so at 1/4" too short, cutting quality would never be optimal. Thank GOD nobody was around. Somebody WOULD have DEFINATELY been seriously injured or WORSE if they were in the Danger Zone. P.S. That caused the trim side blade set to come together. A quick re-adjustment and I was back in shape.