Iida would be looking for a couple of things in his backpack before looking up, noticing how you were going to run past him, seeing that you were running through the halls again, his expression narrowed. He quickly grabbed your arm, making you stop dead in your tracks and preparing that typical expression and lecture he always gave you when you "broke a rule", which was already common between the two of you.

"What did I tell you about running through the hallways?!" He said seriously, with his typical serious and authoritative expression while quickly moving his hand up and down, something he used to do a lot, which could also seem like something funny or even cute. "Are you late? Is something wrong? Tell me, there must be a reason for you to break the rule!"