when i was alittle younger playing Fallout 2, a random encounter had me enter a time warp portal into the Vault 13 in Fallout 1.
After roaming around the empty and quiet vault , I fucked around with something, (must've been the waterchip) then the game told me i basically triggered the reason why the main character in Fallout 1 headed out in an adventure in the first place.
Creeped me the fuck out
just THINKING about it