Sneeze really loudly.
Yeah, what’s up with that? Is there some physiological change that causes it?
No, at least for some people they can control it. I told my loud sneezing husband who "couldn’t help it " if his sneeze woke the child, the child was his responsibility alone to care for and he found a way to sneeze normally.
With me, I can’t help it. And I always sneeze three times. If I could stop it, I would.