He wants to ask what she means by 'he could be worse', since it's not exactly reassuring, but on second thought, decides it might be better just to leave things be for the time being.

"Yes, we should," he sighs. "I'll just finish repairing the damaged components from the last explosion and then you can take over." As he speaks, he gets back to work putting things back to how they should be or reorganising them into a new arrangement that will hopefully prove a little more explosion-proof.