Help! I dropped a controller on my PC now my graphics are freaking out!

Solution
Shut down, then -
Check that your graphics card is firmly seated in the slot.
Check the power to the card (if it has it) is secure).
Reseat both.
I checked both, and it seemed that the cord supplying the graphics card with power wasn't firmly seated, causing a power shortage in the card. I plugged it in all the way and it is now working fine! Thanks for the information!