Gen was not surprised at all. It's not as if Senku was lazy - he knew he put in work that exhausted himself all the time, dragging him and Chrome and anyone else along for the ride. But Senku was easily worn down by physical activity, Gen knew well. As if he had poured all of his strength into his genius.

Gen was surprised, however, to see a familiar glint of something on his hip. A flash came back to him - Senku had been returning to revive Tsukasa - several things fell together.

He reached for that glimmer revealed along with a sliver of bare skin as Senku had reached over, wanting to grab the, "The Medusa weapon? Just when were you going to tell me you had the Medusa on you?!"