D.S.I Syndrome
D. S. I. is when you hear something so dumb that you start acting like a wild animal and attack the person who said it.
My friend said 'I can talk to ghosts,' and I had D. S. I. and bit his arm.
At the store, I got D. S. I. when the clerk said 'the moon is a sandwich.' I yelled and threw a bag of chips at her.
My little brother said 'I can fly,' and I had D. S. I. and ran around the house like a maniac.