If it was first person, I'd personally start headdesking.
However, since you're doing limited third person, I'd say it's kosher, as it's not like it hasn't happened before. I'd really hate to use television as an example, but Heroes does this frequently, and it's really intriguing to see how each storyline ties together. So, really, I'd say it's an interesting ploy to keep readers on their toes, as they'll have to pay particular attention to as much as possible to fully comprehend why you've suddenly gone from one person to someone else in another part of the planet.
In other words, go for it.