Dont care about how many people there is, just go out and do your thing, with respect and look around the whole audience not just at your papers if you have any :E

And if the bastard should laugh, wait until theyre finished and then continue to talk again.

The important thing is to just forget about what they care and think of how you would like a speaker to be and what he/her would say.

If they dont think its good, its their problems. be sure to be well practiced with what your going to say, if you have a paper its even harder, thats usually when I mess up :E

Goodluck to you!