Look around you!

[theotherguy]

1- Maths
http://www.youtube.com/watch?v=MiMWJ1xBo8w

2-Water
http://www.youtube.com/watch?v=7LqYBncyKpM&feature=related

3-Germs
http://www.youtube.com/watch?v=DLeNU3RIm4o&feature=related

and many more!

 

[-Kashmir-]

Lol, a friend sent a few of these to me a while back. Hilarious

 

[Au-heppa]

There's a lot more of these in youtube. They also had a second season, not sure about third.

 

[Lizardizzle]

did anyone notice that in minute 8:30 of "water", they use the crash sound from half life?