By the time you hear it, it's too late to do anything about it. A long list of viola jokes:
You were born in a car. Now go fetch your sister, Hospitaldaughter. It's time for tablemeal.
Me: *tying my dogs shoes* Sorry, what
You have to drop the bomb on her twice before she gets it.
allahu ackbar!!
Because dogs can't whistle. (X-post from r/dadjokes)
Hearing AIDS
A: It is an optical illusion. It's not that the violas are large just that the viola player's heads are so small.
Cello!