rock, paper, scissors?

Rock/paper/scissors? No, rock, plastic, skeet. Rocks on the beach range from pebbles to huge boulders; here's one that caught my eye this morning

and here with its big brothers

but these red spots are fragments of clay pigeons - I only pick up the bigger pieces like this:

I filled several bags with trash like this:

Amazingly the beach beyond the big rocks was not yet scarred by truck-tracks