"I will be here at the time. I intend to study this zone further, see if I can discern its nature and properties." Rather than admit he's stuck here. Even if he already did at any point, might as well make it a much more dignified sort of stuck. Stuck with purpose!

"And should you ever need to find me and I am not readily seen or found, simply whisper my name into an open flame. I'll hear you." He gives Furiosa a cryptic grin.