I know exactly who's calling and why the second I hear my mobile ring. I'm halfway up the street from the bus stop, at exactly the same point I've always reached when D rings to ask me to get milk. I almost suspect that he has a CCTV camera pointed down the road so he can ensure his timing is perfect. Sure enough, when I pull my mobile out of my bag, it's his picture flashing up.
'Can you get me some milk please?'
I turn round and start walking back to the shop, even as I'm still complaining bitterly about why it's always me who has to go to the shop for milk.
I wouldn't mind so much if he managed to call before I got off the bus so I could just nip straight into the shop.
I wouldn't mind so much if I actually drank milk.