Rufus Wainwright

A curious thing happened when I was listening to Judy :Live at the Carnegie Hall CD and I feel the need to enlist the help of those of you have the album. During "A Foggy Day" after she sings the words "British Museum", I swear a frog croaks. Please check your CD and let me know if you hear strange ribit(you may have to turn it up rather loudly). Quite what I will do if it is just me, I do not know.
Thank you for indulging me. Tata.