Laffensadden
When you’re so amused you’re happy, but then something happens and you’re so annoyed you’re about to throw a fit.
I was happy my dog ate my homework. Then he ate my math test. I was so mad I threw my pencil at him.
I was happy my friend told me a joke. Then he told me another joke. I was so annoyed I yelled at him.
I was happy my teacher gave me extra credit. Then she gave me extra homework. I was so annoyed I threw my eraser at the board.