It's the perfect opportunity—or as perfect as it can get, under the current circumstances—and Kylo Ren doesn't hesitate to take it. He dashes towards the open path, not allowing the pain of his old-turned-new wound hold him back, and makes an impressive leap over the cart and rolls, having to take a couple of seconds before getting back to his feet and up to a running speed. His saber goes out, which allows him to hold a gloved hand to his side in an attempt to stop himself from leaving an obvious trail of blood. It's successful enough that he is eventually able to lose his pursuers, though it drains him and leaves him worse off than before.

He'll realize how much of a fool he'd been to create that disturbance—he doesn't care about the life he took or the injuries he caused, but it was brash and stupid, even for him. He'll wonder what came over him, why he'd so clearly put a target on his back when he was still half injured and lacked any useful information about the consequences such an action might have. It's unlikely he'll ever realize it came from a doll, which, if nothing else, will spare some of his remaining pride.