Who Has Seen the Wind?

[CGRossetti]

Who has seen the wind?
Neither I nor you:
But when the leaves hang trembling,
The wind is passing through.

Who has seen the wind?
Neither you nor I:
But when the trees bow down their heads,
The wind is passing by.

Who has seen the wind?
Neither I nor you.
But when the trousers start a-rippling,
The wind is farting through.

@OldTinHat second verse:
when the bath water starts bubbling
the wind is farting out.

@BashfulClam I love your lines, much better!