For example, you are having fun with your friends and then someone you don't like comes in and all of a sudden you change your face.
Answers (1)
Hello Jaexpham!
I don't believe this would be one emotion but several,
it would be exactly as you described it, depending on how you felt towards the person who walked in
Happy > Angry
Happy > Agitated
Happy > Dissappointed
And even in the end, you'd still have mixed emotions about this person either way, if you're having fun and somebody you hate walks in, you aren't just going to feel Sad are you? You're going to also feel disappointed, stressed, a persons emotion can be doing great and all of a sudden it can be crushed.
If you were to tell this to someone they would probably reply 'Bipolar', but that in fact is not the case, all you did was go from happy, to sad quickly because something you didn't like just happened.
And of course if you're disgusted, and don't like something you're going to make a face most likely, this just matches up with your emotions. And is only natural on instinct.
Hope this helped Somewhat! (: