University of Florida student Tasered at Kerry forum

This video is disturbing. What happened to the motto of preserving "Freedom of Speech"? He was asking a question only. "What have I done"? His question was valid, and he had the right to ask it. He wasn't violent while asking the question. Then why would he be tasered? In front of the "power" helpless' cries get unanswered. Why this episode reminds me the similar ones from other parts of the world?

Three Video Links:

Another longer version video:

Amy Goodman from Democracy Now commenting on this episode: