I got a call from a very professional sounding woman assuring me she was with Google and they had discovered some potentially fraudulent activity with my Google account in Frankfurt. They said they had locked down my account to protect it but they would walk me through recovering it.
I knew this was impossible, because the Google account in question doesn't have passwords. It has a couple of passkeys which are all physical hardware tokens in my home. But I wanted to see how pushy they would get.
Turned into a half hour phone call with me playing dumb (was watching my kid's sports practice, nothing to do for a half hour but cheer him on). Eventually when I was done with it I let them know I was in the process of filing the report with the federal cybercrime department. Immediately hung up from that.