I had a 15 foot aluminum ladder fly off a truck in front of me. Thankfully it landed flat and I had time to get front wheel off the ground and I kind of motox'd over it (on my GSXR
)
I hit it hard enough to bend my back wheel. It kicked up and smashed the grill and headlight of the guy's sweet dually that was behind me. He was definitely not pleased but was more amazed at my supercross skills on my gixxer. (honestly not nearly as amazed as I was)