See me once, I like riddles so don't be a buzzkill
See me twice, tell everyone because I'm really ill

First hint:

See me once, when hit I do a spiral
See me twice, when hip I do go viral

I am prepared to give out more hints if needed. Good luck!

_{Here are the previous riddles in this series (the solutions there have nothing to do with this one, only the process of getting there).
#1, #2, #3, #4, #5, #6, #7}