It took me until after the deadline to work out what to do a multimedia presentation on (just a prototype, though, thank god). Instead, I... learned to touchtype in about two hours, and went to the pub. It was my birthday at the weekend, but still...
Luckily, late submissions are accepted (and not capped, there's just a scaling mark penalty that, if I hand it in two days late, is equivalent to getting one question wrong on the exam). But still, why is it so hard to think of presentation topics?