SURPRISE!
Explanation
The Joke
A father bursts into his children's bedroom at night wearing a monster costume, screaming to scare them. He then lectures them that this was a "simulated monster attack" and scolds them for not making an orderly exit, warning that in a real attack they would all be dead. His daughter points out that monsters aren't real. The father asks "What do you call a man who terrifies his kids at 3 AM on a school night entirely for his own amusement?" She responds with "Touche" — conceding that the real monster is, in fact, her father.
The Humor
The comic works on multiple levels. First, there's the absurdity of a father conducting emergency monster drills on his children as if monsters were a genuine threat requiring preparedness training. The twist comes when the daughter correctly identifies that monsters aren't real, only for the father to cleverly redefine himself as the real "monster" — someone who terrorizes children at 3 AM for fun. The daughter's "Touche" acknowledges that he's technically correct. The final line "See you in an hour" implies he plans to do this again, reinforcing that he's doing this purely for his own entertainment rather than any educational purpose.