I would, at first, seem immobilised; fear stricken, even. In my brain, I would think to myself, "This must be a joke. Why did he do this? He must be mocking me." At the thought, tears would begin to bubble, and I would then proceed to assume the crying facial expression of a massive frown. My first kiss, in which I wanted to make one of the most special moments in my life,, was just stolen, never to return to me again. Some random person stole it, and it was only a joke, to them. Their inconsideration, their selfishness, their general rudeness; would drive me to tears, and because of this, I would run away and hide, though, I would most likely have wanted to slap said person a few times on the cheeks. I would not be able to handle the embarrassment. I would simply run away and hide and sob in the nearest, safest corner.
tl;dr - jerk i h8 u