How do I get crunked?

Hello, I’m a college student on summer break & have never been crunked before. My parents are leaving town in a couple of days and my brother told me he wants to get Crunked together. I’ve never done it. How do I do it? How do I not go overboard/underboard? Help a guy out pls.

(ps, if anyone asks, I am of legal drinking age and had a Miller Lite before, just never got crunked)