what is your worst virus experience?

I somehow got randomware from a setup which I ran before without any issues, I think I forgot to untick all the ad offers, I am not sure though.
So that time I got infected with GandCrab v5.0.4. which encrypted all my files, luckily there was some guy on Twitter (I forget the name unfortunately) working on a decrypt tool which got my files back, god bless ya. :please: