I worked at a camp where another staff member said she wanted a copperhead..if one of us had a chance, she wanted us to kill it so she could make a hatband.
One evening I did see one on the path on my way to main camp. I wasn't sure she really wanted it and I certainly didn't want to kill it because it wasn't bugging me and it was on the path first.

So, I picked up a big rock and laid it on it's head. Figured I'd give it a fair chance to get away and let the staffer be responsible for releasing it if she didn't want it (if it stayed trapped)

Apparently you can trap them by putting a rock on their head.
She was pleased.

My other snake story (although I'm not sure what these snakes have to do with the topic at hand?) is that when parts of my state flooded in '93, people DID see knots of snakes in the river. I've never heard of that happening and I suppose it had something to do with the water moving quickly and the snakes being grabby..getting tangled on their equally grabby friends and relations.