I'm going to drive a railroad spike through my skull
A full-blown meltdown you have when someone is so dumb it feels like your brain is getting stabbed by a spike from the inside.
My friend said he eats rocks for breakfast. I said, 'I'm going to drive a railroad spike through my skull.'
My sister said she can fly. I said, 'I'm going to drive a railroad spike through my skull.'
My dad said the moon is made of cheese. I said, 'I'm going to drive a railroad spike through my skull.'