Harry blushed, though he was glad that Roger managed to keep him from falling. So much for natural Auror grace. Of course, Harry had only ever had natural grace on a broom, so maybe it it wasn't that surprising.
"No, it was my fault. I was lost in fault and didn't see you." Which was ridiculous, because Roger was kind of hard to miss normally. "And I'm fine. You, uh, caught me before I fell." Smooth, Potter. Real smooth. "Are you okay? I didn't hurt you did I? I was walking pretty fast."