Sure this is extremely difficult, as you (okay, I at least) need more than ten seconds before you get to the lava part. So what’s the trick?
There must be some kind of camera exploit that you used to achieve this. Like going out of the camera zone so briefly and immediately hopping over to another part of the level where the camera can go to. What's that exploit you used? Can you explain how it happened? We are all really interested to know!
I’m going to be completely honest here. I actually didn’t use any exploits or hacks as there are none that exist for BL2.