It was helpful to me Julie - i might have to try that ...anyway this is about Psy
Psy - really if it made you feel so uncomfortable (was it panic attack uncomfortable, fight or flight situation?) then stand up and make your presentation, I don't think you should avouid the subject at all, it's something you are really passionate about and SHOULD be speaking about imho, you are articulate and intelligent when it comes to this subject
Maybe you're real concern here would be to find out why it's bothered you so much that the sitting down upset the balance, you already know why sitting down to make your presentation bothered you, it's more imprtant to find out why you are worrying about it, it's perfectly understandable! Anyone who had been through a trauma like that is going to feel uneasy when put in the same situation
I'd really concentrate on the work you're doing Psy, continue with it and stand up next time, it doesn't matter that you feel uncomfortable with sitting, of course your psyche is going to tell you to be on the defensive, you're asking too much of yourself to try and force yourself to just 'get over it' - just go with what's comfortable for you and don't beat yourself up because you can't face it, no-one is going to kill you for standing up - why put yourself through it when you don't have to?