Odd hazards in the lake

[LakeDad]

What is the strangest thing you've hit or almost almost hit at speed on the lake?

On Monday, I almost hit a watermelon, an entire watermelon with only the top cut off.
It was just below the surface and I'd never have seen it had I not just missed it starboard side.
I've also encountered towels, a shoe and multiple hats, which I remove from the water when found.