That's how he (mini) rolls

Poor Andy ended up getting soaked walking home from school.

It turned out that when George took a phone call from Mo saying she'd pick Andy up, he'd misunderstood. She was actually asking if I could pick him up. 

When I realised my mistake I went out to find him, but there was no sign. I did manage to drive past Matt without stopping though, to make matters worse.   

Don't know where Andy found this expression. He was actually asking, very politely, if he could have a mini-roll - whereas he looks more like he's about to attack me with it.