Nothing, because the Fed promised us a maximum hike of 25 basis points. Hiking rates by 25 basis points (for the first time in 9 years) is like your parents threatening to take away your Gameboy if you don't finish your homework.
According to Pew Research Center "most Americans said it is difficult to decipher the Fed’s policies on interest rates. Seven-in-ten said it was hard to understand the Fed’s interest rate policies while only 27% said it was easy (including just 7% who said it was very easy)."
Also, 70% of people don't know who Janet Yellen is.
So there you have it: No one knows what really happens when the Fed raises rates.