This is the kind of thing that will probably be funny later. For now, Enjolras, his own attention focused on a book clutched in his hands, going over a handwritten passage with softer eyes than usual, doesn't notice anyone else, particularly another person with a book crossing in front of him, nor that he happens to be crossing the same way, straight into her as well.

His first return to reality is a loud oof as the breath gets knocked out of him, though he doesn't lose his grip on the volume in hand. "I...please..." he's trying to get up now, sort of. "Forgive me. I've uncovered an old friend, here."