"Safety is relative." Senku offered in return, of course he was expecting this to be something similar to the last time he explored inside a caving system in his own world.

"I've got this now." He held up the SCA. "And my tools, so that's about as safe as I'm gonna get."

"This is theoretically a volcano, maybe there's some treasured minerals inside." If he was back in the village, he'd have brought more equipment, but such as it was he was rolling the dice on his luck, which was a horrible plan because he did not have good luck.