How to treat this joke: a village woman mistakenly entered the doctoral group?

I just strayed into a group of doctors. A man asked: A drop of water falls freely from a very high place. Will hitting people hurt people? Or killed?

The group immediately became lively and discussed various formulas, assumptions, various resistances, gravity and acceleration for nearly an hour.

I can't help asking: Have you ever been caught in the rain?

There was a sudden silence in the group ......

Then, hey! Then I was kicked out ...

In fact, this joke depends on how you understand it. In fact, people who make up jokes should be very clever, planting seeds for the image of a traditional bookworm, just to make everyone laugh and satirize flying high.

But from an academic point of view, the problem sets the theme, that is, free fall, raindrops are subject to air resistance, so the doctors' own discussion is no problem, but it is actually a flawed joke.