this is from scaryoke, grunkle stan was selling the ufo keychains
unless ford already had one exactly like the ones that stan is selling, ford got his from the gift shop
im just imagining him seeing it there like “ohh this is neat……..y’know this is my house anyway, he can spare one keychain” and he steals it
I also love how he has both the Snow glob and UFO key chain there as if its foreshadowing the events that are to come.