If you are a kid and hide in the yard of a strange old men. / You are gonna have a bad time. (meanwhile he is gonna have a good time)
A SouthPark Bad Time meme meme.
You're Gonna Have a Bad Time is the ski instructor from South Park's "Asspen" episode, warning Stan: "If you ski off course, then you're gonna have a bad time." Captions name an obviously bad choice and promise the consequences. It's the meme for warnings that should go without saying.