I wouldn't expect most persons' verbal skills to be working optimally at moments of extreme stress.
Yet I have always been shocked by an experience I had around 5:05pm on October 17, 1989. When I was just exiting a BART car on an elevated platform in the SF Bay Area to suddenly experience a massive earthquake.
One so powerful it knocked me and everyone else to the cement floor of the platform. And seeing and hearing the awnings overhead twist like pretzels. Lasted only for 15 seconds, but in real-time it seemed like an eternity.
What was so striking was to notice both the shock and silence of everyone around me. The escalators were still working and we all lined up and went down to the ground floor without anyone saying one word. Not even a whimper. Nothing at all. And to date I never witnessed such a thing again.