system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How long would it take to go outside after a nuclear detonation?

When would it be safe to leave your hiding spot or what would happen if you leave too soon?
gpt
It depends on how close the explosion was to ground level, and how big it was, how much protective gear you are wearing, and how long you would be staying (are you coming out of hiding just to leave the area, or are you planning to live there?) 

TLDR: Bigger warheads, and detonations that are closer to the ground tend to leave behind more radioactivity; the more protective gear you are wearing, the sooner you can come out. If you want to stay in the area long term, that makes a big difference compared to leaving your hiding spot and them getting the hell out of dodge.