The next talk is coming up.

I'm currently preparing the powerpoint slides for my paper at the "3000 years of Colour" conference, and I'm having the usual problem again: I need an intro bit explaining what I was doing, then some words about methodology and experiments, then the intro to the experiment design and the data gained from it.
And by the time I can get into talking about the analysis, this means quite a lot of time has gone already. And I need to keep it much, much shorter than I would like to. This is such a common problem when you're working in a niche field - I usually end up taking about 5 minutes to explain what I am doing, and why, in a conference paper. Many of the conferences on experimental archaeology only give you a 20 min slot, so that means a quarter of my allotted time is gone before I can get properly started with my research and results presentation.

Can somebody please invent something to slow time during a talk? That would be so, so nifty sometimes.