I went to The Computer Shop to buy some blank CDs for my computer. I got CD-RWs, thinking it might be useful to be able to rewrite them if I make changes to my files. When I get them home, I realize that my drive can't handle Ultra Speed, only High Speed. So a few days later, I take the CDs back to the shop to exchange them; only The Computer Shop has a really narky returns policy and won't allow it. So I wait to speak to the manager, who doesn't turn up for ages, so I just buy some CD-Rs and have done with it. I have my rucksack with me, so I don't ask for a bag. It's crammed full of books and two reams of paper, so it's hard to fit it all in. Later in the afternoon, when I'm meeting a friend for tea and lunch, I realize that I haven't actually packed the CD-Rs; I've got the RWs, which are useless to me, but must have left the Rs on the counter! So I return sheepishly, tail between my legs, later in the day to ask for my CD-Rs, with my receipt to prove what an idiot I have been. Re:tardy?