For the past 10-15 minutes, LAX has been dealing with some FOD on 24L and shuffling planes over to 24R as a result. But then they got overloaded. Just now, it sounds like the controllers swapped a heavy (on final for 24L) with someone else (on final for 24R). They gave a visual separation and cleared the heavy to land on 24R and the other guy to 24L. Interesting.