Whistle in You Shook Me

[BlyZeppelinaren]

This is might be a really specific question but this is the right place to ask right?

So I got the Deluxe box set for LZ as a graduation present yesterday(loving it so far) and I obviously listened to it and when I listened to the L'Olympia show on the companion disc it reminded me of a small detail that I loved when I first heard the bootleg which is the whistle Robert does during You Shook Me when he goes;"... I got a bird that whistles.." and for some reason it really stuck on to me, it's a freaking awesome whistle and I'm wondering if he does it at any other show.

I've listened to quite a lot of shows with YSM but I don't recall ever hearing him do that besides that one show, so does anybody know?

Here's the whistle in question

[tmtomh]

To the best of my recollection, this is the only time he did that (or at least the only time he did it when a tape recorder was running).

And yeah, I always liked that too!