This video is from Turkey (or around there somewhere in the general area) and it features two Tuvan throat singers. The one guy on the right starts up and then the person on the left breaks in with a much harsher note.
The guy in this video demonstrates a Rubens Tube. He has a speaker at one end of a piece of PVC pipe that contains holes. He runs propane into the tube and lights it up like a camp stove. The pipes sound through the speaker and the sound waves compress the air in the tube giving the sound wave visualization in the flames.
This guy has a printer setup that writes images on toast using a small blowtorch. It's basically an ink jet printer except that it uses a blowtorch instead. One of a kind toaster.
This demo video from some video game show demonstrates the Havok physics engine with a bunch of different materials. They throw objects through various materials (wood, glass, jelly, metal) and they break up, dent, or bounce back like they would in the real world (no pre-animation).
The guy in this video takes one for the team by having a water balloon thrown at his head. A video is then recorded at around 1000 frames per second of the water balloon hitting him and spraying everywhere.
The guy in this video demostrates the difference between a CD player that is playing a CD and a CD player that is not playing a CD in space. Apparently the spinning CD causes a gyroscopic effect which keeps the playing player stabilized.
This video from Microsoft shows off a prototype device that projects a screen onto a tabletop and then allows you to interact with it via motion sensing. Probably the best example of it's use in the video is they have one side of a chess board (the side you are playing) as physical objects and the other side as virtual. So the person you are playing against is displayed via the projection over the chess board.
In this video the camera is mounted on a model rocket facing downwards as it launchs. It looks like they launch multiple rockets at the same time from the smoke trails. Also if you look at 0:11 in the video it seems like either the video distorts or the fins on the tail of the rocket turn into jelly for a few seconds before reverting back to their static positions.