User blog comment:KIT1084/Did the UFO cause the town's strange properties, or did the town's strange properties attract the craft?/@comment-27495100-20160307013814

I agree with you with the UFO crashing first, as it makes the most sense, but it's interseting that in Dipper and Mabel vs the future, Ford never told Dipper if the UFO crashed first or not, so maybe he doesn't know, or he knows, but didn't tell Dipper.