My speed running abilities..

So I was doing a race with my friend, this was awhile back. But, when I was doing the Submerged Castle, I actually managed to get past sub-level 2 without the waterwraith coming. I know some people might be capable of doing that like I did, but I'm pretty certain that means it's possible to do the whole cave without him coming, it probably just depends on the layout/enemies maybe.