They didn't like something in the previous breads and are going to force a flush to make it hard for us to go back and read it.
Probably the GPS coord drops from the day. We have a weakness in how we record notables and breads in general - that is the sheer volume of traffic. That is why we moved to 8ch from 4ch - to have the opportunity to catch what gets slid out of the thread, but by flooding it constantly, it still makes it impractical to keep up with the current bread and track prior breads, particularly with around 500 posts/hour.
The forum slide isn't just a tactic to distract members, it is a means of pushing relevant information out of focus when the power to delete it does not lay in your hands.