Wait for it
A man had an IQ of 168 and he was finding it really difficult to make friends with normal people, so he went to see what his doctor could do for him. As luck would have it, the Doc had just purchased an amazing new machine that could shrink the size of the human brain. He strapped him into the contraption and flipped the switch. Just at that moment the telephone rang and the doctor went to answer it.
Five minutes later he came back and realized he'd forgotten about the genius he'd strapped into the machine. "Oh my god!" he cried as he switched off the power. A quick test revealed the IQ of the man had been reduced to 1.
"Speak to me, say something - anything!" screamed the doctor.
Eventually, in a deep Neanderthal type voice the guy grunted "RAIN".
"Come on, come on, say something else - are you all right?" implored the Doc.
Again, all the man could grunt was "RAIN"
"What is it, what are you trying to say?" asked the doctor.
"RANGERS!"