She's stopped before she can do anything

Kaneki barely had time to recognize something was falling before a pile of large, industrial steel beams collided with Rize.

The pile managed to catch Kaneki's lower torso and legs in their fall, and Kaneki didn't even have time to scream before he blacked out.

A lone ghoul stood above and looked at the mess he had just created. Only small streams of blood trickling out from under the beams signified that the ghoul known as Rize Kamashiro ever existed. The ghoul admired his handiwork one last time before he set off into the night.

His job there was finished.