That's essentially how we do snapshots now. You can look backwards until you find something that clears the screen or loads a new page, and save some work by j

That's essentially how we do snapshots now. You can look backwards until you find something that clears the screen or loads a new page, and save some work by just drawing from there. So yeah, jumping to a frame isn't too hard. You just run the risk of melting something if you try using that technique to reverse the playback.