Situation: you are immortal for 24 hours. You can do literally anything without permanent/lasting affects to your body, mind, or emotional well being. You get hurt? You heal without pain and are perfectly fine. Get into a substance? Addiction isn’t a problem. You’re perfectly fine for 24 hours.
What are you doing?
Me personally? I’ve always been curious about coke. I’ve always wanted to know what that’s like so, there’s my first. And I’d probably try to harvest an organ or something from myself- just to see what mine specifically look like.