How to Do Impressions

I was a kid in school, and I just... I could mimic any cartoon that was on for my classmates. And then I knew I could do something that other kids couldn't do. But I only did them as a party trick, really, for most of my life. Until people like yourself, friends like yourself, went, no, put it on stage. And now I do it for wherever I go, so for work. How can I just ask, which is really quickly? Because I've always been absolutely amazed by what you can do. It's phenomenal.