Allen's reply is a wryly teasing, "I reckon that would be making things too convenient for us, Lavi."

The horror.

"Frankly, I'm more worried about walking into things than falling down them. We should be fine as long as we keep a healthy distance away from the river bank."

He turns to Karkat, plainly expecting the troll to show him what needs to be done right even as he calls over his shoulder, "We'll leave the pointers to you, then. Give us a shout if you need help."

...Or if something happens. Allen doesn't much like the thought of any of them going back into the fog alone, Tyki included, but they do need to be as efficient as possible.