Auh, uh...it's this thing that happens out in space? I don't know the full science behind it, but there's...bends...that happen in certain levels of...magnetism? [he can't remember. it's too cold for science!] It makes little pockets of altered states of time, compared to regular relativity.

The train I was on got caught up in a magnetic storm that threw us through one. Shot us onto a planet three years in the past for a bit until we could get rescued.