A concept can work at both the joking and serious levels simultaneously. Sometimes this has been called "ha ha, only serious": http://encyclopedia2.thefreedict

A concept can work at both the joking and serious levels simultaneously. Sometimes this has been called "ha ha, only serious": http://encyclopedia2.thefreedictionary.com/ha+ha+only+serious http://encyclopedia2.thefreedictionary.com/ha+ha+only+seriou...