This sounds weird but my husband is now on an oxygen machine...when he lays on the tube by accident.... it lets out a really loud whistle and Chanel RACES behind the couch hiding and shaking - she is really REALLY scared of it and not scared of anything else in my whole house - I have to coax her out and feel so bad seeing her skake.
the funny thing is Cheri isn't bothered at all the the noise and will look up but that's all - and she is the real baby in the house normally...but Chanel is terrified by that whistling noise.