Excellent! He will do just that. But the rat he tries to catch the attention of does not appear to see him, so when the next one appears - a little further away - he automatically walks forward to catch its eye.

It would not be quite honest to say he had forgotten Enjolras was attached to him, and he does not care how this might inconvenience the boy. Being the one standing, he has the advantage, so if Enjolras gets pulled along a little...so be it.