Community Vault-Tec experiments

Hi everyone, I play co-op with my son and a couple of friends and I’m planning on setting up a vault exploration scenario in February. I wanted to see if the community has some ideas for exploring vaults that don’t show up in the games (i.e. I don’t want to just wiki/re-use the vaults from fallout 1-4). I’d be interested in reading what experiment/horrific result you’ve come up with for your own Vault-crawls.