He was about to grab Mirko and-!... What...?

You had slid in and due to where he was throwing himself he ended up landing with his head against his chest, which allowed you to lay a hand on him to activate your quirk.

"This... this feels familiar..." Tomura mumbled out as just about every ounce of tension or anger temporarily left him and he felt oddly tired as you played into the role and pat his hair. His hand twitched upward before he grumbled and... fell asleep there??