hey dimitrij, i've advised every other student to avoid the addition of 'faces' to their objects, if the face is not created from the actual attributes of the thing itself. i know Meg feels as strongly about this; check out kolade's blog, as he and i have had similar conversations:http://orisagbemi-olorun.blogspot.com/
Well,for it's going to be hard to express it being nervous without some kind of facial expression.
What you need to do, is use the parts of the plant to make the expressions - so either the petals or in the case above, maybe the spines of the cactus...
I was thinkin' of going for the previous design of the pot plant. It's just that when someone is nervous,unfortunatly they make a minimum of movement,so it's hard for me to think something like that. I'll try though.