Like the title implies, the poster above you asks a serious or sincere question, then you reply in an ubsurd or unreasonable fashion along with another sincere question for the next poster to answer etc.
Example:
A: Why do people laugh in class every time someone mentions the planet Uranus in the lecture?
B: They think your teacher is referring to chicken genitals.
When will the planet die?
C: When Nasu writes Tsuki 2, which won't happen in our lifetime for sure.
Why.... etc.
Why can't we use our brains to the fullest potential yet?