This demonstrates unexpected scope behavior in solidity when cloning structs.

Solidity - clone struct

pragma solidity ^0.4.19;
pragma experimental ABIEncoderV2;
contract Tester {
    
    struct Foo {
    	bool stayFalse;
    }
    
    function Tester() public {
    }
    
    function runTest() public constant returns (bool) {
        Foo memory foo;
        return one(foo);
    }
    
    function one(Foo memory foo) public constant returns (bool){
    	Foo memory foobar;
    	foobar = two(foo);
    	return foo.stayFalse;
    }
    
    function two(Foo memory bar) public constant returns(Foo) {
    	bar.stayFalse = true;
    	return bar;
    }

}