Khyan: http://www.youtube.com/Khyan
Tom Ska: http://www.youtube.com/tomska
Jenny Bingham: http://www.youtube.com/thatjennybee
Charlie: http://www.youtube.com/user/charlieissocoollike
Video shot by Ciaran who also made this one: http://www.youtube.com/watch?v=5hjoDOnzr5s
music by Jake Chudnow: http://www.soundcloud.com/JakeChudnow
More tweets from Khyan: http://twitter.com/#!/khyan
Some of his most popular: http://favstar.fm/users/Khyan
LEARN LINKS:
Great all-around artcile on humor and laughing and tickling: http://www.damninteresting.com/humoring-the-gelotologists/
More on the vocab of humor research: http://www.worldlaughtertour.com/pdfs/gelopedia.pdf
Theories of Humor: https://www.msu.edu/~jdowell/monro.html
Psychology Today interview with comedians about what makes something funny: http://www.psychologytoday.com/articles/200808/wisecrackers
Scary: http://en.wikipedia.org/wiki/Death_from_laughter
Demetri Martin tweeted images: http://www.whosay.com/DemetriMartin/photos/
Tickling on wikipedia: http://en.wikipedia.org/wiki/Tickling