The Best of Jaywalking: This will make you weep (and laugh) at the state of the US educational system.
Secret Agent Dog
The Impromptu Expert: This is real. Read the newspaper article first, then watch the video.
Grand theft sled.
The shell game. 2 out of 3 ain’t bad. 
Scary metronome.
Who's on First The classic Abbott and Costello comedy routine.
Cats in Sinks Maybe it's just me, but if I need a smile, I go to this site.
Gardening Tips from a Man Who's Very Scared of Plants. This is the kind of video that you either find to be funny or not. Me, it cracks me up.
A Lecture on Slapstick. Classic Dick Van Dyke on the art and history of slapstick.
So an EECS prof and an undergrad walk into a computer lab.... A computer program that rates jokes and gives suggestions based on each user's personal sense of humor. Fun to participate.
Quantitative Analysis. Sometimes you feel like a nut, sometimes you don't.
Brownian motion. On the macro level. 
How to Tell if your Cat is Plotting to Kill You. Vital clues you may have overlooked.
Wake-up call for breakfast. Persistence and creativity required.
The Linguist
Medieval Tech Support Help Desk and Tech Support in the old days. Introduction to the new system:"The Book"
Competition for Resources
Where the Hell is Matt? Amazing, amusing trips around the world in less than 4 minutes.
The Pianist
The latest generations of iPods One person who placed an online order for the iPod Invisa received an email from Apple stating that it too has already been discontinued
A Million Random Digits with 100,000 Normal Deviates. This classic, first published Rand in 1955, was reissued in 2002. See Amazon for a lot of funny customer reviews. The original edition is online.
TiddyBear I saw this advertisement in the middle of the night on cable TV and I thought that it was a joke. But, lo and behold it is the real deal.
Words of wisdom from Yogi Berra
What the Professor Really Means
Home Page of William Stallings