I've found so much stuff over the last 27 seasons that it's hard to remember it all. A couple that stand out are a 16oz hammer that I found at the start of a 35 mile ride and carried the entire ride in my hand. Another was a step ladder that i carried home on a fixie; luckily, it was only a couple miles.
Many years ago, I had a Thunderbird with huge wheels and hubcaps. One day, I was riding this horribly rough road when my wife passed me in her T-bird. A little ways down the road was a T-Bird hubcap in the ditch and figured she lost one og hers. I picked up the hubcap and headed home in to a horrible headwind with this huge, heavy hubcap between my hands like a steering wheel. My wife returns home a couple hours later with all of her hubcaps intact.