Weird happening!

[flvideo]

I was just backing up a clip on DV tape and At the very end of it, about the last 30 seconds, some music that was on the first 30 seconds of the clip came up on top of the video. I went back to the scene bin and clicked on trim and then out to see the end and the music was there. I went to the mix screen and I can't see any thing on that scene. Then the editor went off like someone had pulled the plug. It fired right bac up and I don't see any apparent problem. Has anyone else seen this on ther machines before?