It isn't ideal. [He agrees. After a moment he glances back out at the desert. Whatever he's looking for - even he doesn't know - he doesn't find it. The town gets closer as he says,]

Hopefully, whatever supplies the town has can help with those blisters. [He spots something out of the corner of his eye but he keeps moving. He slows enough to walk side by side with Alec. His voice goes low, the calm dropping away into seriousness.] To the left, don't look directly at it. What do you see?

[To the left on top of a sand dune where they hadn't been before are a group of cacti. They sway in the now evening breeze. They seem to be moving bit by bit, sharp needles turned towards them.]