I’ve witnessed one tornado in my life (had others come close, just never saw them; either middle of night, too far, or obscured).
We were driving on I-81 in Virginia, had just gotten gas and back on the road. I looked in the rear-view mirror, then asked Nisha to look behind us and tell me what she saw. Very calmly, she said “Looks like a tornado”. (we both did a good job of conveying calm, to not freak out the other person as much as each of us felt on our own)
That was when I found out that the top speed on my Chrysler mini-van was something more than the 85mph that the speedometer went to.