S'pose it would be churlish of me to suggest that in fact the chap whose job routinely involves identifying flying mammals in people's attics would in fact have the opportunity to slip in variations on the "bats in your belfry" theme pretty frequently....

Luckily however I am not a churl, so I will not make that suggestion.

I'd forgotten what a great word that is. Churl. Churl. Churlywurlywuurl. Chuuurl. Yep, great word.