Presenting in 50 minutes

[callicrates]

My conference presentation is in 50 minutes, give or take 5. I've got a couple of trivial changes to make to the slides but the substance and the order of my presentation is finished. I know it by heart and then some. Maybe it's not the strongest work I've ever shown, but it's something I actually did that actually helped scientists get their jobs done. I know I'm good at technical presentations and public speaking doesn't bother me much.

So why am I so nervous?