As a ref at the Rhode Island event, I saw a robot in Auto go full-speed backwards (not sure if it was programmed wrong or just placed on the field the wrong way around), right into a Cheval de Fail, bending one of the "planks".
https://twitter.com/laj517/status/713440848839630848
For the entire year, I alternated between being amazed at how much carnage happened to the field and its elements, and being amazed at how well it all held up considering what it was going through. I know the New England fields' bottom-of-driver-stations diamond plate will never be the same again, even though during take-down we jump on it trying to get it straightened out again.