这是什么语法现象?看下面的.My friend said he know a man with a wooden leg

这是什么语法现象?看下面的.
My friend said he know a man with a wooden leg named Smith.
So I asked him,"What was the name of his other leg?"
“a man with a wooden leg named Smith”:1.一个名叫Smith的人有一条木腿（a man named Smith 一个人名叫 Smith ）2.一个人有一条名叫Smith的木腿（a wooden leg named Smith 一条木腿名叫Smith）.你能解释一下这种幽默效果是源自英语的什么语法现象吗?