"It's nothing, you really don't have to go this far to thank me. We should focus on leaving."
Jin-woo fidgeted due to the amount of gratitude washing over him, after all, he was partly the reason they were in this situation in the first place. He didn't know how they would react when they found that out, so he rather not have them thank him like this.
Unlike the young students, the two female and three male teachers were more composed as they thanked Jin-woo. They then did their best to settle down the forty or so students, before directing them to leave.
Jin-woo also advised them to stick to either side of the hallway as they moved while he stood at the center since he had a gun.