I once had a "roommate"* for several months that did a ridiculously good Walken impersonation. Like, good enough that if you recorded it and played it back to back with a real Walken recording, it would be extremely difficult to tell them apart.

The problem was, he would do this constantly. Sometimes going days in end refusing to speak normally. I once overhear him dirty talking to himself while masturbating and using the voice. It was awful.

*Very long, funny-in-the-telling type of story that was genuinely fucking awful