Oh, so you're one of those naughty people who don't return albums! (I'd have nagged you to death myself, but maybe Kevan went off OMD) So where have you been for 4 years?
[ZK -- how it happened] I'm not supposed to tell you this, but you ought to know. If you had attended that lecture, you would have met the love of your life and lived a happy life together. However, the son you would have had would eventually grow up to be an evil despot worse than any seen before in human history, responsible for the annihilation of 90% of the human race. Therefore, time travellers from that blighted future came back to last night and laced your drink with large quantities of tranquiliser, ensuring you overslept and missed the lecture, thus averting the creation of that timeline. You may be in trouble now, but think of the far greater calamity that has been relatively painlessly averted. Seriously, hope you don't get in too much bother over it. (Assuming an "Attending" answer to Raak's Q:) Do they take a register or is it a small enough class that absences are noticeable? What are you studying that only has one lecture a week?