If you're referring to the WR times, on Patch 15b there was a bug with the Firestarter (red rocket launcher variant) that allowed you to create a layer of oil and then shoot it with the Malicious Railcannon to create a series of explosions. these explosions would kill the Leviathan basically as soon as it spawned. In the hotfix after, Patch 15c, it was removed from the game and is no longer possible unless you downpatch.

Although downpatching to run 5-4 of all levels is just boring -w-

I... think I got that all right (if not feel free to correct me qwq)

Edit: should be accurate now?

happens, sadly 3:

the run has to be from the first level to the last, without quitting out, so unfortunately i'm assuming that's a yes. just out of curiosity, what category were you running and what level did you crash on?