Not in the literal sense but i've just bought some lovely rocket dog flip flops that are so comfy but every now and then they make a very loud squelchy fart noise, not the normal clicky sound 
Its not all the time so i get lulled into a false sense of security with the bloody things and then out the blue, a giant Parmf comes from my feet.
I've just done the school run and had my right foot announce my arrival as i entered the playground 
Is there anything i can do or do i have to ditch them to the back of the cupboard.