"If you could indulge me for a moment? I think this horse is meant for someone to sit on, and to...well, bounce up and down, with this spring mechanism here, you see? Would you mind trying it? So I can take a look at the spring as you do."

Combeferre has let a wheedling tone creep into his voice, probably because he's aware that he's asking Enjolras to do something mildly ridiculous.

But Enjolras has done more than this to aid Combeferre's inquiries in the course of their friendship.