They have a tendency to make bad noises unexpectedly and generally smell worse than they once did. (automobilemag.com)
Then, in the Sienna, the blower started making a real bad noise, and wouldn't blow air. (redeeminggod.com)
The worst thing to do is to just let them talk, as this can often lead to either disruption within the class or even worse noise levels that disturb neighboring teachers. (thoughtco.com)