@habuajaar that last part is extremely normal for caves with a lot of caves having much deeper levels of water for the activity it’s why cave diving is a thing but in this it just seems like a lot since they’re crawling in actuality it’s barely higher than half a wellie, the sinking feeling is mostly just from the mud at the bottom which slips very easily but it’s typically (and in this case) a thinnish layer with very hard rock underneath (the reason i wear gloves)