Well, I think once you've had one bodhran break, the audience is on high alert and it's pretty hard to spring another on them unawares. I do think a fiddle break might be good, if you think you can saw away with no discernible melody except an unending chain of squeals and groans.
As far as audiences go, I don't pay much attention since you only see them at the beginning of the first tune. God knows where they go after that, and it certainly isn't my business.