The circle of fear (a simple Chinese joke)

In a Chinese learning Facebook group, a friend posted this simple Chinese joke. I thought I’d share it.
The core word you need to know is:
怕 (Pà) which means “fears” or “is afraid of” (in this context).
And from there, I think you can work out the rest of the joke. (Never spoil a joke by explaining it too far).
2021-04-02