Don't worry..
That was classic improv at its best... You can't get a better one...
Keep it up.. who cares what they think of you. They're all there to learn Java, anyway... so what does it matter? It isn't like its a "class president" meeting... You're good to go.. and keep up the shenanigans.. let us know what else transpires, as it is bound to happen with a class full of stiffs being around you.
Ray